17T Bicycle Carbon Rear Derailleur Guide Wheel Ceramic Bearing

$201.82
Brand:
Product Code: BRPARTS-052
Availability: In Stock
Technical parameter
Frame Brand OEM Brand
Frame Type Carbon Fiber Bicycle Derailleur Kit
Product Material Carbon Fiber, Ceramic, 7075 Aluminum Alloy
Weight About 58-72g
Suitable for SHIMANO 6700/6800/9000
Available Color Black
Color Customization Supported
Wholesale Supported Supported
Package Included 1 Set * Bike Derailleur kits, Commercial Invoice
Shipping Limitation Supporting Global Transport
Shipping Time 5-15days
Payment Method Credit card, Debit card, Paypal, Western union, Money Gram, Boleto, CIMB Clicks, Dotpay, eNETS Debit, Maybank2u, MOLPay, Poli, QIWI, SOFORT, TrsustPay, WebMoney, Yandex.Money, Wechat, Alipay
Custom Tax And Import Duty Buyers Bear The Charges

17T Oversized Pulley Wheel System, Save 60% frictional resistance than 11T. Ceramic bearing version can save more than 2.4 watt. Full carbon fiber cages. CNC AL7075 lightweight pulleys and axles Weight: 17TS:58-71.4g. Ceramic version 1.2g less than steel version. According to test result, increase the rear derailleur pulley wheel size could significantly, decrease the friction between the chain plates caused by polygon effects during chain bending and reduce the resistance for saving rider’s cycling power.

The chain is composed of several short pieces with an inch long, we could see the chain as one inch long with around one hundred and ten section lines, due to small diameter of turning circle, when the lines pass through standard 11T pulley wheel, it needs a certain angle to turn the transferring direction of chain for about 180° through two wheels, after increasing the pulley wheel size, the chain turning angle are decreased, so the loss of friction is less correspondingly. The results shows that 17T is a good balance point between weight and decreasing the polygon effects. To increase the size blindly will lead to arc decreasing not obvious, together with weight and volume adding.

Compared with common 11T pulley wheel, the friction loss caused by polygon effects of chain could be decreased about 60%.

Besides, under the same transferring speed of chain, the axis rotation speed of 17T is slower for saving the self friction loss during bearing rotation, smaller cycle could also reduce the resistance of each turn rotation. To upgrade this ceramic bearing saves more power loss.

Faster gear shifts. firstly, porous spring position limit could adjust back tension largely, improve the weakness of original weak stretch, and make the up and down chain tension between guide wheel and cogs much more adequately.

Secondly, the contact tooth number or control tooth number between chain and cogs of rear derailleur, 17T is more during gear shifting, it just like to pinch the middle and two sides of some sticks, the larger the control lever, the stronger the control power.

Lastly, after redesign the cage's rotation curve, the distance between upper guide wheel and the cogs is improved.

And we should also tell customer that the compatibility of 11-28T cogs, the length of chain is within the range of 405-410mm standard road bike chain stay, suggest using more than 114 links, but not too short chain, or it might lead to too large back tension and enlarge the tooth tip resistance between chain and pulley wheels. (In case customer just has short chain, suggesting install it to lowest tension of spring mounting hole).


It can faster SHIMANO system up and down gear to improve 20%-26%. save 2.4 watts more.

Anesska 2019-08-17 15:59:34

Fast shipping. Purse just as described.

Candice 2019-07-26 08:12:00

Super Part, well made, beautiful Appearance and fast Delivery

Amanda 2019-06-12 09:51:00

I am very satisfied with this item. looks fantastic and gives great performance.

Vanessa 2019-05-21 11:23:00

It goes very fine and a spectacular finish

Stanley 2019-04-02 15:27:00

Overseas shipping but quickly temperature seem to think more durable and also, performance is good. Chance is again buy manufacturers.

Sherry 2019-03-23 21:36:00

It looks great. And it goes very fine. An exceptional purchase.

Rachel 2019-01-23 21:18:00

The quality and the weight of the goods were satisfied with the price.Also, it takes 13 days to ship. Thank you!

Otis 2018-12-27 04:33:00

The parcel came quickly to moscow, before the deadline. Quality norms, not ceramicspeed of course, but definitely better drain. I recommend

Neil 2018-11-12 12:51:00

Very good item, thank you!

Lynn 2018-08-09 08:19:00

At 105 came as a native!!! Rollers rotate very well!!!

Lou 2018-07-22 10:58:00

Great! Super smooth running.

Jennifer 2018-04-13 14:41:00

The quality is excellent.In short i recommend.

Grover 2018-01-14 06:25:00

Fast delivery. derailleur very nice.. all ok thank you so much...

Gilbert 2017-12-24 18:35:00

Very protected and in perfect conditions.

Florence 2017-11-27 11:59:00

Super fast bearings spin forever!

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