17TSRカーボンファイバーバイクリアディレイラープーリージョッキーホイールセラミックベアリング超軽量自転車
製品説明
* 12 / 17T超大型サイズの案内輪セットシステム
*「11Tガイドホイールに比べて45％鎖摩擦抵抗を保存
*セラミックベアリングバージョンは、元の伝送システムに比べて平均電力以上2.2ワットを節約します
*フルカーボンファイバーガイドアーム
*完全な7075アルミニウム合金CNC切断軽量ガイドホイール及びTC4チタン合金のスピンドル
*Color: Anode red, enamel, blue, gold, green
SRAMのRIVAL FORCE RED適し* 17TSR
バージョンベアリング*セラミックベアリングバージョン組合せセラミック軸受のバージョンNSKスチール
*重量：63グラム
*セラミックベアリングのバージョンは、鋼製のベアリングのバージョンよりも1.2グラム軽いです
1.Different from other brands with eccentric designs, we designed these two products adopting the SRAM concentric design. The benefit of such design is that it won’t have any negative impact on neither the crisp shifting feel nor the tooth capability of the cassette nor
This is also the exact reason why Shimano ceased the production of 6800/9000 and upgraded their design to R8000/9100.
Therefore, we choose 12T/17T over 17T/17T.
Compared to original transmission system with 11T pulley, our products decrease friction resistance by 45%, ceramic bearing pulleys save more than 2.2 watts on average with each pedaling, increase shifting speed by 20-26%. Enhanced chain stability by implementing narrow-wide tooth upper pulley for more accurate and crisper shifting.
2.Extended tooth for lower pulley, to prevent chains from coming off.
One thing to clarify is that, it’s not wise to implement narrow-wide tooth to any situation.
Yes, narrow-wide tooth provides better stability, but it is achieved at the cost of more friction resistance. As designers and manufacturers, we aim to be adaptable, to provide different products for different occasions, to suit your need best, not bragging a certain “high tech” which looks fancy but brings negative impact for your experience.
3. Titanium alloy CNC shaft.
To pursue the goal of lightweight, we overcame as many obstacles as possible, even it’s just for 2-4 grams of improvement. Shafts of products for ETAP and mechanical are both made of 6/4 titanium alloy. Even in original SRAM products, titanium shafts are only available with RED RD, not even ETAP, ETAP shafts are made of steel.
4.Patent design for ultra-lightweight concentric upper pulley structure.
One 7075CNC screw to fasten 7 pieces. Easy to maintain or customize while remain light and durable.
なぜディレイラープーリーホイールを交換します
まず、多孔質のばね位置制限は、主にバックテンションを調整元弱ストレッチの弱点を改善し、アップし、はるかに適切にガイドホイールと歯の間にチェーン張力下を作ることができます。
第二に、リアディレーラ17Tのチェーンと歯の間の接触歯数または制御歯数は、より多くの変速時に、それはちょうど真ん中と一部棒の両側に、より強い、制御レバー大きい制御電源を挟むようなものです。
最後に、後にケージの回転曲線を再設計し、上部ガイドホイールと歯との間の距離が改善されます。
インストール手順
1.Fist, find the screw of pulley wheel cage in the back of rear derailleur
2.Remove the screw with cross tip Screwdriver
3.Pull out the screw
4. Remove and grease the screw and spring before assembly the new 12-17T carbon cade
5. We suggest fix the spring in the left hole for the first time assembly
6. Grease the titanium axle before assembly new cage
7. Push the spring in the hole
8. Clockwise rotate the cage andpush into rear derailleur
9. Push all when make sure the positioning post right in the position
10. Push back the screw in the hole and fix with cross tip screwdrive
11. Finish
Concentric swing system.
SRAM has been on a different path when it comes to RD design. While Shimano and CP prefer eccentric structure, SRAM chooses concentric structure. With eccentric RD structure, the RD shifting suffers from the length difference of chain between different FD positions. If there is no FD, eccentric design is just perfect for the impact from the shifting curve from cassette to the chain length change, just like what SRAM has done for 1X system, which fulfill both the need for speedy shifting and stability.
The new Shimano DA9100 and R8000 are implementing concentric upper pulley design, which is just another example of the excellency of such design, the relatively fixed position of the upper pulley prevents negative impacts from both jumpy surface and FD shifting, ensures the accuracy and speed of RD shifting.
