-
- NEW INTELLIGENT SHIFTING TECHNOLOGIES TO ELEVATE YOUR RIDE
- Explore New Grounds with SHIMANO’s new intelligent shifting technologies. The truly pioneering engineering results in new ways of shifting that combat common gear-based problems that (almost) all cyclists experience. With DEORE XT Di2, which is specifically designed for e-bikes and compatible with the updated EP8 and new EP6 motors, both beginners and experienced riders can enjoy FREE SHIFT and AUTO SHIFT. Gear shifting is taken to never-before-seen levels of innovation, with FREE SHIFT allowing you to change gear without pedaling, and AUTO SHIFT changing gear for you without you having to click a lever.
- 13/06/2024
SELECT LOCATION AND LANGUAGE
GLOBAL
AMERICAS
-
BELGIUM
FRANÇAIS
-
BELGIUM
NEDERLANDS
-
NETHERLANDS
NEDERLANDS
-
SWITZERLAND
DEUTSCH
-
SWITZERLAND
FRANÇAIS
-
SWITZERLAND
ITALIANO
-
AUSTRIA
DEUTSCH
-
FRANCE
FRANÇAIS
-
GERMANY
DEUTSCH
-
ITALY
ITALIANO
-
SPAIN
ESPAÑOL
-
PORTUGAL
PORTUGUÊS
-
POLAND
POLSKI
-
UNITED KINGDOM
ENGLISH
-
SWEDEN
SVENSKA
-
DENMARK
DANSK
-
NORWAY
NORSK
-
FINLAND
SUOMI
EUROPE
ASIA
OCEANIA
Jarruasiaa
Jarruasiaa
Jarrut kuuluvat polkupyörän tärkeimpiin rakenneosiin. Seuraavassa tarkastelemme joitakin maastopyöräjarruihin liittyviä muuttujia. Jarrujen toimintaan liittyy useita todella huomionarvoisia yksityiskohtia.
Jos jarrujen toiminnassa esiintyy puutteita, pyörän hallittavuus kärsii ja onnettomuusriski lisääntyy. Tarkastelemme seuraavassa jarrujen toimintaan liittyviä muuttujia ja teknologiaratkaisuja helposti ymmärrettävällä tavalla.
Mikä on hydraulinen levyjarru?
Hydraulisten levyjarrujen toiminta perustuu jarrujärjestelmässä olevan jarrunesteen käyttäytymiseen painevaikutuksen alaisena. Kun jarruvipua käytetään, jarruneste painaa jarrusatulassa sijaitseviin mäntiin yhdistettyjä jarrupaloja jarrulevyä vasten. Palojen ja levyn kosketuskohdassa muodostuu kitkaa, jonka vaikutuksesta ajonopeus hidastuu.
Mihin hydraulisilla levyjarruilla varustetussa pyörässä kannattaa kiinnittää huomiota?
Se, millaiset jarrut sopivat parhaiten mihinkin pyörään, riippuu pyörän suunnitellusta käyttötarkoituksesta. Alamäki (DH)-tyyppisessä ajossa liikutaan suurilla nopeuksilla todella vaativassa ympäristössä. Cross Country (XC) -maastopyöräily taas sisältää topografialtaan vaihtelevia osuuksia eivätkä ajonopeudet kohoa yhtä korkeiksi. DH vaatii maksimaalista pysäytystehoa. XC:ssä taas komponenttien painolla on suurempi merkitys. Lyhyesti sanottuna: jarrujen valinnassa on huomiotava lajikohtaiset erityisvaatimukset.
Maastopyörien jarrulevyistä
Linkkinä jarrujärjestelmän ja pyörän välillä toimivan jarrulevyn vaikutus pyörän kokonaissuorituskykyyn on todella suuri. Maastopyöriin on saatavana useita jarrulevykokoja: 140 mm, 160 mm, 180 mm, 203 mm ja 220 mm. Äkkiseltään voisi kuvitella, että mitä suurempi levy, sitä parempi, mutta läheskään aina näin ei ole. Avaintekijä jarrulevyn kokovalinnan kannalta on lämmönhallinta. Jos jarrulevy kuumenee liikaa, seurauksena on jarrutehon heikkeneminen. Myöskään liian viileänä toimivan jarrulevyn teho ei ole optimaalinen. Tärkeä muuttuja tässä on kitkanmuodostus, jonka on oltava riittävä, mutta ei niin suuri, että levy ylikuumenee.
Painava ajaja, suuret ajonopeudet, jyrkät ja vaativat alamäkiosuudet – tällaisissa tapauksissa suuremmat jarrulevyt tulevat tarpeeseen. Joskus näkee pyöriä, joissa etujarrulevy on silmiinpistävän suuri ja takajarrulevy pieni. Mistä tällaisessa yhdistelmässä on kysymys? Alamäkiajossa painopiste keskittyy eteen, jolloin hidastus on tavanomaista huomattavasti suuremmalta osin (jopa 70 %) etujarrun varassa. Suurikokoinen etujarrulevy on tällöin todella tarpeen.
Jarrulevyn väristä voi usein päätellä, onko sen koko asianmukainen vai ei. Asia on todennäköisesti kunnossa, jos levy on tasaisen kiiltävä. Jos levyssä esiintyy sateenkaarimaista kirjavuutta, on aihetta epäillä, että sen lämpötila on joskus kohonnut liian korkeaksi.
Uudet RT-CL900- ja RT-CL800-jarrulevyt
Uusien RT-CL900- ja RT-CL800-jarrulevyjen innovatiiviset teknologiaratkaisut auttavat optimoimaan suorituskykyominaisuudet. Näiden kokonaisprofiililtaan aiempaa kapeampien ja pienemmällä offsetilla varustettujen, rakenteeltaan päivitettyjen levyjen värähtelytaipumus on entistä vähäisempi, mikä edesauttaa lämmön poissiirtymistä ja tasoittaa jarrutuntumaa. RT-CL900-levyt on käsitelty lämmönsiirtoa jopa 10 % tehostavalla maalilla. Mallikohtaiset kokovaihtoehdot ovat 140 mm, 160 mm, 180 mm ja 203 mm.
Myös jarrusatuloilla, -männillä ja -paloilla on oma tärkeä roolinsa
Shimanon jarrusatulavaihtoehtoihin kuuluu sekä 2- että 4-mäntäisiä malleja. Yksinkertaisemmissa 2-mäntäisissä malleissa on yksi mäntä jarrusatulan kummallakin puolella. Suuripinta-alaisilla jarrupaloilla varustetut 4-mäntäiset jarrusatulat varmistavat maksimaalisen jarrutehon. Koko ei kuitenkaan ole kaikki kaikessa. Tärkeämpää on että jarrujärjestelmä on käyttötarpeet huomioiden oikein mitoitettu.
Jarrupalatyypit voidaan pääsääntöisesti jakaa kahteen luokkaan: sintratut (metalli) ja orgaaniset (hartsi). Sintratut metallipalat pääsevät oikeuksiinsa ajoympäristöissä, joissa jarrukomponentit altistuvat voimakkaasti hiekalle, mudalle ja vaativille sääoloille. Sintratut palat ovat hyvä valinta myös vaihtelevissa, jyrkkyyseroiltaan melko maltillisissa ajoympäristöissä. Orgaanisia paloja suositellaan sekä kuiviin että märkiin ajoympäristöihin sekä vuoristoalueilla, joilla on pitkiä laskuja. Yleensä ne kuluvat hieman metallipaloja nopeammin.
ICE TECHNOLOGY -rakenne ehkäisee jarrulevyjen ylikuumenemista
Jos jarrut kuumenevat liikaa, niiden toimintateho heikkenee. Tämä ei ole mitenkään suotava ilmiö tiukoissa ajotilanteissa, joissa jarrujen tehokkaalla toiminnalla on suurtakin suurempi merkitys. ICE TECHNOLOGY -jarrulevyjen kolmikerrosrakenne (ruostumaton teräs-alumiini-ruostumaton teräs) varmistaa tehokkaan lämmönsiirron ja tasaisen luotettavan jarrutustehon. ICE TECHNOLOGY -rakennetta hyödynnetään seuraavissa Shimanon levyjarrumalleissa:
- RT-CL900
- RT-CL800
- RT-MT900
- RT-MT905
- RT-MT800
- SM-RT900
- SM-RT800
- SM-RT86
- SM-RT70
ICE TECHNOLOGIES FREEZA varmistaa huipputehokkaan lämmönsiirron
ICE TECHNOLOGY -rakenteeseen perustuvat, lisäjäähdytyselementillä varustetut ICE TECHNOLOGIES FREEZA -jarrulevyt siirtävät lämpöä äärimmäisen tehokkaasti. Jäähdytysripojen ja kolmikerrosrakenteen ansiosta jarrulevyn lämpötila pysyy jopa 50 ℃ tavanomaista alhaisempana. Tutustu ICE TECHNOLOGIES FREEZA -rakenteella varustettuihin XTR- ja XT-jarrulevyihimme.
SERVOWAVE minimoi jarruviiveen
SERVOWAVE-mekanismi varmistaa jarrujen nopean ja tehokkaan reagoinnin. SERVOWAVE-mekanismi lyhentää jarrupalojen ja -levyn kontaktointiin tarvittavaa jarruvivun liikepituutta ja lisää jarrutuksen progressiivisuutta. SERVOWAVE parantaa jarruvipujen toiminnallista ergonomisuutta ja tehostaa jarrutuntumaa.
YKSISUUNTAINEN ILMAUS helpottaa huoltotoimenpiteitä
Jos nestejarrujärjestelmään pääsee ilmaa, jarrujen toimintateho heikkenee ratkaisevasti. Tämän välttämiseksi olemme kehittäneet yksisuuntaiseen öljyreititykseen perustuvan ilmausjärjestelyn. Yksinkertaistetun öljyreitityksen ansiosta jarrujen ilmaaminen käy helposti ilman ilmakontaminaatioriskiä. Suosittelemme käyttämään Shimano-jarruissa Shimano-mineraaliöljyä, joka tarjoaa useita etuja DOT-jarrunesteisiin verrattuna. Korkean 200 °C kiehumispisteen ja vedenhylkivyyden ansiosta jarrujen suorituskyky pysyy erinomaisena myös raskaassa kuormituksessa. Ympäristöystävällinen Shimano-mineraaliöljy ehkäisee korroosiota eikä vahingoita pyörän muoviosia tai maalipintoja.
Ulottuvuussäätö varmistaa vipujen täydellisen istuvuuden
(Maasto)pyöräily on sitä nautittavampaa, mitä paremmin vivut ovat ajajan käsikoon ja käyttömieltymysten kannalta optimaalisessa paikassa ja asennossa. Ulottuvuussäädön avulla jokainen pyöräilijä löytää itselleen sopivat vipukohtaiset etäisyysasetukset.
Share this article
Like this article
Aiheeseen liittyviä juttuja
-
- Shimano FRONT SHIFT NEXT
- Cycling doesn’t need to be complicated. It can be simple, straightforward, and all about the freedom of two-wheeled adventures. And while it may feel like cycling sometimes requires a deep wealth of technical know-how, the best components and bike technology require minimal thought. They work as intended, all the time.
- 23/05/2024
-
- Shimano GRX Di2 12-Speed
- New 2x12 Di2 Addition to Shimano’s Legendary Gravel Group
- 23/05/2024
-
- AUTO SHIFT: For happier miles
- our AUTO SHIFT technology marks one of the biggest ever steps forward in cycling innovation. The concept of automated shifting has become a reality. The technology certainly delivers, but how does it work in a practical, real-world sense? And what are its benefits to you?
- 17/05/2024
-
- SHIMANO'S NEW GRAVITY FOOTWEAR FAMILY
- Get rowdy on rugged DH tracks. Go big on backcountry epics. Smash out more laps on the local trails. Shimano's new GE Gravity Enduro MTB shoes come from 30+ years of clipless pedal expertise. They are purpose-built for precision control and uncompromising performance for aggressive trail, enduro, and downhill riding.
- 25/04/2024
-
- Gravity Footwear: Camille Balanche and Wyn Masters
- Camille Balanche and Wyn Masters—great partnerships often come in pairs, just like our shoes. Watch our video of these two mountain bike legends, each approaching the sport differently but connected through our Gravity Footwear. The video was shot in beautiful New Zealand.
- 11/04/2024
-
- SHIMANO 105: Mechanical Magic
- If groupsets are like rockstars, and we think they are, the SHIMANO 105 Mechanical 12-speed could be Bruce Springsteen. Ever-professional performance, incomparable longevity, balancing roughneck beauty and that pure joy that comes from doing things in a classic way. Learn all there is to know about our only premium mechanical groupset.
- 26/03/2024
-
- spotlight-grx-12-speed-mechanical
- In an ever-more computerized world, we set out to break the mold by breathing new life into mechanical shifting to give you a gravel ally that works with next-level analog technology. Or three distinct allies, to be precise. For this piece, we asked none
- 01/02/2024
-
- Our Mechanics’ Winter E-Bike Tips
- E-biking is supposed to be a convenient and fun experience. But how do you keep enjoying your ride when the temperature drops? Taking care of your e-bike during winter will ensure consistent performance and a more pleasurable ride and increase your bike's longevity. That’s why we asked this year’s Shimano Mechanics Championships U.K. winner for his top e-bike maintenance tips for winter.
- 19/01/2024
-
- How to Kickstart Your Cycle Commute
- Commute by bike and you’ll beat the traffic and get where you need to go on time – while creating some space for exercise and fun. What bike you choose, what you wear and what you carry with you is influenced by the distance and how efficiently you want to ride. We’ve picked out a few tips to make the best choices for your commute.
- 29/09/2023
-
- New SHIMANO GRX 12-Speed Mechanical
- Gravel cycling is not meant to be overly complicated. The heart and soul of cycling’s drop bar, dirt road discipline is rooted in simplicity, inclusivity, and adventure. No ride is out of bounds. All are welcome to join. Gear should be functional and reliable but need not break the bank.
- 31/08/2023
-
- Shimano GRX Personalities
- What does it mean to be a gravel cyclist? There is no one definitive answer—and that’s the beauty of cycling’s drop bar, dirt road discipline. Indeed, gravel cycling is about personal expression and the freedom to choose. There is no rule book, no established norms, no stodgy old traditions. You decide when, where, and how to ride.
- 31/08/2023
-
- United in Gravel
- United in Gravel is our call to everyone, from any level, to go out and enjoy life in the saddle. It’s about tackling that hill, bounding down the dirt roads and farm tracks, trails, and tarmac – or cruising the city streets and urban jungle in the best possible way. The joy of riding together in places beyond words. Just watch the video to see the beauty of riding beyond the beaten track.
- 24/05/2023
-
- We start where the road ends
- The make-up of gravel riders reflects the terrain that beckons them. Just like the different stones, sand and clay, gravel riders are a mixture of ethnicities, genders and orientations. We are found around the globe and across the economic spectrum. We come in all shapes, sizes and levels of fitness, all united in our passion.
- 28/04/2023
-
- Shimano Road Wheels Explained
- Shimano wheels benefit from over 100 years of engineering expertise and experience, and the latest crop of 12-speed wheels sprung from an extensive history of racing and riding excellence. Shimano's performance road wheelsets are organized into three tiers: Dura-Ace for unsurpassed race performance, Ultegra for the discerning enthusiast, and Shimano 105-level RS710 wheels built for reliability and value.
- 21/02/2023
-
- WHAT IS SHIMANO LINKGLIDE?
- To fully understand SHIMANO LINKGLIDE technology and what it can do for you, it helps to first ask yourself what mountain bike drivetrain features and functions you value most. If your answer centers around low weight and lightning-fast shifting, then SHIMANO’s best-in-class HYPERGLIDE+ is the right choice. HYPERGLIDE+ drivetrains dominate the start lines of the world's fastest races, where competitors are in a constant quest for marginal gains and measure success in grams shaved and seconds saved.
- 17/02/2023
-
- Shimano Di2 Deep Dive
- Consistent. Customizable. Instantaneous. Intuitive. Precise. Reliable. Seamless. All these words accurately describe Shimano’s Di2 wireless electronic shifting experience. And now with the launch of the new invalid link: https://road.shimano.com/105di2/Shimano 105 Di2 R7100 series, you can add affordable to that list.
- 07/02/2023
-
- SHIMANO Performance Carbon Road Wheels
- From the fastest sprints and hardest climbs of the WorldTour to the everyday riding experience close to home, SHIMANO's lineup of road wheels delivers high-end performance to take you farther, faster, or higher on any ride. Developed with over 100 years of engineering expertise and experience, the newest models of 11- and 12-speed road wheelsets are organized into three tiers with features to suit every road rider.
- 03/02/2023
-
- MADE IN: Milano
- Expertise and passion for crafting made-to-measure bikes are at the heart of the Italian Passoni brand. Founded in the late 80's in the pre-carbon era by Luciano and Luca Passoni, it was the first company in Europe that produced titanium bikes when off-the-shelf tubing wasn't yet available. Every tube had to be made by starting from titanium sheets which were bended and welded into exceptional quality, bespoke bicycle frames. A passion for the sport and its culture has always been at the very heart of Passoni’s identity as they have spent the last 30 years building stunning machines for those with a true appreciation of fine craftsmanship. Passoni has always been a brand steeped in cycling history.
- 12/01/2023
-
- SHIMANO Indexed Shifting Explained
- Indexing is the predetermined, incremental movement of a derailleur that corresponds with each click of a shifter. When a derailleur is activated, either by a mechanical shifter tensioning or releasing a cable or the Di2 button to activate derailleur motors, the component will move the chain from cog to cog on the rear cassette or different chainrings in the front. SIS derailleurs and shifters are designed to move a specific amount to achieve accurate and reliable gear changes every time.
- 11/12/2022
-
- How to upgrade your cycling experience
- Make your daily cycling more enjoyable. From new clothes to brighter bike lights, a waterproof jacket or puncture-proof tyres there are plenty of ways to upgrade and improve your cycling this winter.
- 22/11/2022
-
- How far can you go on an e-bike? Barcelona to Girona
- One of the joys of cycling is heading out on an all-day adventure. Leaving in the fresh light of the early morning and returning dusty, satisfied and relaxed just as dusk falls. Even better is doing it on an e-bike because with pedal assistance you can go further, see more and enjoy your day out without returning home exhausted.
- 27/09/2022
-
- How to simplify your life and make bikes part of your everyday
- A new e-bike is an investment, and although it can be expensive, it is a purchase that you will enjoy using every day. Here’s five reasons having a bike can simplify your life.
- 26/09/2022
-
- How to look after your e-bike at home and in the bike shop
- Looking after your e-bike is really important for both your safety and your enjoyment of cycling. With some simple checks to do at home and the support of trained and certified mechanics at a Shimano Service Center you can easily keep your bike in perfect working order!
- 23/09/2022
-
- How to choose the right e-bike for you
- Buying the right e-bike for your cycling needs is the first step to being a happy e-bike rider. Looking for an urban e-bike for city use? Bewildered by the options? Let us guide you through your choices.
- 19/09/2022
-
- How to use your e-bike modes to improve your fitness How to use your e-bike modes to improve your fitness
- How can you balance getting help from your e-bike with putting in enough effort to feel like you have benefitted your health?
- 19/09/2022
-
- How to set your bike up to feel comfortable
- Your perfect bike should fit you like a glove, with a few tweaks to your riding position everyone can enjoy comfortable, care-free cycling. We take a look at your bike’s contact points and the adjustments that can be made to customise your bike to your body.
- 19/09/2022
-
- A Humble Pursuit of Perfection
- Trek Project One Ultimate: SHIMANO’s 100 Years of Excellence
- 31/03/2022
-
- New DEORE XT and DEORE with LINKGLIDE technology
- Say hello to reduced drivetrain wear and tear. Thanks to SHIMANO DEORE XT and DEORE with LINKGLIDE technology, you can enjoy high-mileage, low-maintenance cycling for years to come – without worrying about having to replace or repair components.
- 23/03/2022
-
- E-bike myths – busted!
- Electric bikes have revolutionised cycling and millions of new people are discovering the benefits of e-bikes each year. But still people have their doubts. Here we bust a few e-bike myths and share with you why we think e-bikes are not just here to stay but are going to revolutionise cycling.
- 21/03/2022
-
- CUSTOMIZE YOUR RIDE
- The way you ride e-bikes is about to change forever thanks to SHIMANO’s revolutionary EP8 e-bike system featuring unheralded levels of customization via the accompanying E-TUBE PROJECT Cyclist App.
- 21/09/2021
-
- TEN REASONS TO RIDE SHIMANO EP8
- In 2016, we unveiled SHIMANO STEPS E8000. As the first e-MTB dedicated e-bike system, it was celebrated globally by riders and was considered a true game changer.
- 20/09/2021
-
- JURA SICK E-MTB RIDE
- Francois Bailly-Maître is no stranger to tough enduro trails and long days in the saddle, but a 100-kilometre tour of the French Jura’s finest trails was beyond his reach. Until now... The Jura Sick e-MTB ride combined eleven different trails, 5000 vertical metres of climbing and the SHIMANO EP8-powered Santa Cruz Bullit. The result: a whole new level of MTB ride, and a whole new level of fun!
- 20/09/2021
-
- READY TO RIDE THE REVOLUTION WITH SHIMANO EP8?
- There’s an e-bike revolution going down and we’ve raised the e-MTB benchmark. Through evolution, we introduce EP8. The game-changing drive unit riders have been waiting for.
- 20/09/2021
-
- WHICH IS THE RIGHT BRAKE FOR YOU?
- hoosing the equipment for your bike can seem like a never-ending task; a circle of questions and options and decisions. What do I need; what do I want; what can I afford?
- 17/09/2021
-
- HYPERGLIDE+
- Revolutionising shifting performance, Shimano’s HYPERGLIDE+ shift technology delivers the world’s smoothest, most precise shifting in all riding conditions.
- 17/09/2021
-
- Shimano Di2: The Ultimate Shift
- The Uncompromising Reliability and Performance of Shimano Di2
- 16/08/2021
-
- Choosing the right Shimano SPD-SL road cleats for you
- Shimano SPD-SL road pedals and cleats are a popular choice among professional and amateur cyclists thanks to their stable platform, easy operation, and long-lasting performance. The wide, low-profile cleats distribute force evenly and allow for easy walkability without needing to carry special cleat covers for your mid-ride coffee stop.
- 26/04/2021
-
- Change Your Handlebar Position to Improve Your Ride
- Often taken for granted, the handlebar is one of the most important components on your road bike. Along with your pedals and saddle, it’s one of three contact points that define how you interact with your bike and the road ahead. It is also your bike’s proverbial steering wheel, controlling how your bike handles, and it plays a critical role in fit and aerodynamics as well.
- 22/04/2021
-
- Shimano Dura-Ace and Ultegra Long Axle Pedals
- Enhancing stance width through pedal axle lengths
- 16/04/2021
