Roda Jockey 17TSR fibra de carboni de bicicletes de canvi del darrere Politges de ceràmica Tenint Ultralleuger bicicletes
Descripció del producte
* 12 / 17T super gran sistema de joc de rodes guia de mida
* Estalvia 45% resistència a la fricció de la cadena en comparació amb rodes de guia 11T "
* La versió de suport de ceràmica estalvia més de 2,2 watts de potència mitjana en comparació amb el sistema de transmissió original
* Braç guia de fibra de carboni completa
* 7075 d'aliatge d'alumini completa de tall CNC roda de guia lleuger i titani TC4 cargol aliatge
*Color: Anode red, enamel, blue, gold, green
* 17TSR adequada per XARXA SRAM RIVAL FORÇA
* Tenint ceràmica versió híbrida del coixinet de ceràmica Versió NSK Tenint Acer Versió
* Pes: 63 grams
* La versió de coixinet ceràmic és de 1,2 grams més lleuger que la versió de coixinet d'acer
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.
Per què reemplaçar la roda de politja desviador
En primer lloc, límit de posició ressort porós podria ajustar de nou la tensió en gran part, millorar la debilitat d'estirament feble original, i fer que el amunt i avall de tensió de la cadena entre la roda de guia i dents molt més adequadament.
En segon lloc, el nombre de dents de contacte o de control del nombre de dents entre la cadena i les dents de 17T canvi del darrere és més durant el canvi de marxes, que igual que per pessigar el centre i dos costats d'uns pals, major és la palanca de control, major és la potència de control.
Finalment, després de redissenyar corba de rotació de la gàbia, es millora la distància entre la roda de guia superior i les dents.
passos per a la instal·lació
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.
