I have a Shimano XTR 9 speeds RD-M970 rear derailleur(short cage) and would like to use it for a XTR 9 speeds 11-34T cassette. Is it a workable combo ? Or do I need a RD-M971 instead ?

Recently I bought a old version of the Shimano 5600 with the Rear Derrailuer of a newer Shimano RD5800 and both mechanics I went to told me it couldn't be compatible while the seller assured me he rode two months with this setup. Should I look for a RD5600/5700 or is it compatible with the Rd5800?

Peacock? Peecok+? $9.99 a month no commercials?

I am in a bit of a quandry. I am not sure what would be the most appropriate bike rack for my new Mustang. Are there any recommendations for a model rack that might be easy to attach and remove on the fly? Thank you!

Is it possible/safe to use rim tape, clincher tire/tube on a tubular wheel? I got a couple of nice old vintage Italian bicycles that have Campy Shamal tubular wheels and tubular tires. The spend 90% of their life on a wall mount and I take them for a ride occasionally in really nice weather for...