Fancy having a go at Duo.
Got an older 5 bolt RS7 Middleburn square taper chainset. Can I just buy a 5 bolt eg. 36T Middleburn ring to replace the current middle ring, ditch the outer, adjust the front mech and give it a spin (the inner ring is 22T).
Or is it more complex than that? Would I need to change the b/b axle length?
I've got an RS7 Duo set of rings/spider for sale if you're interested - email in profile
http://www.chainreactioncycles.com/Models.aspx?ModelID=3329
http://www.chainreactioncycles.com/Models.aspx?ModelID=3327
Yep it'll be fine. no you won't have to change the BB
You will need some shorter chainring bolts, but replacing just the rings is a nice and simple solution.
The more elegant solution is replacing the spider with a duo, but you don't have as much choice with chainring sizes.
Cheers, Rich
many thanks ... looks like it's worth a go