Me refiero a la bieleta no a la puntera. La bieleta si cruje por que se ensucia es pq tiene cierta holgura.
El principal ruido de la bieleta es por falta de grasa de fábrica pero también puede que la bieleta haya cogido holgura porque se ha aflojado el eje y al estar flojo se desliza lateralmente y se desgasta. Si le metes caña y no has revisado el par de apriete de los tornillos de los brazos de la bieleta, sobre todo de nueva que es más propensa a aflojarse algún tornillo, la bieleta hace ruido y por mucho que aprietes se seguirá deslizando y la única solución es rellenar los huecos con loctite 638 para que no se mueva. Es un problema de las rise que en los foros ingleses está más que reportado. No es que la bieletas estén defectuosas sino que no es el mejor diseño del mundo y si tienes mala suerte y se te afloja y/o no está bien montada y no te das cuenta pues a cambiarla toca.
“ 1) The linkage arm (Right, Drive Side) has slipped on the pivot axle spline. The aluminum axle can now make small creaking shifts side to side across the upper pivot bearings. If enough play has developed, you may also feel a "Bending/Loose" sensation in the rear triangle as if the bike is wrapping around you on hard cornering.
2) The second cause of creaking is a lack of grease on the upper and or lower pivot axles where they ride on the upper and lower frame mounted pivot bearings.
Note: A third known cause of Rise creaking is excessive wear/play in the rear wheel hub bearing (Right, Drive Side) and the two small freehub bearings which the cassette spins on. The torque produced by eBike motors is extremely hard on rear wheel hub and free hub bearings. Lift the rear wheel off the ground. Spin the rear wheel and place your finger on the chain stay or seat stay. You should feel an absolute smooth sensation as the wheel spins. If you feel any rough or notchy vibration, it means you have a wheel hub bearing (Usually drive side) going out. If your bike has a creaking noise while pressing down hard on the pedals, this may indicate a freehub bearing is also going bad. If I have to change one bearing, I change all the bearings. ”
https://www.emtbforums.com/threads/orbea-rise-upper-axle-grease-and-thread-lock-only-maintenance.32745/https://www.emtbforums.com/threads/part-1-orbea-rise-upper-linkage-axle-and-bearing-service.26533/