Biopace versus Cyclone
#1
Junior Member
Thread Starter
Biopace versus Cyclone
I'm assembling a 12-speed Frankenbike, and need to know if a Shimano 105 "Biopace" crank will play nice with Suntour Cyclone derailleurs, front and back, and six speed freewheel. All friction, non-indexed. Thanks!
#3
Senior Member
Should be fine. Before indexing we switched between brands of derailleurs, shifters, and freewheels all the time. Biopace wasn't that far off from round to cause problems - unlike real oval/elliptical rings like Durham's and similar.
#4
Senior Member
Join Date: Nov 2010
Location: Sacramento, CA
Posts: 22,998
Bikes: old ones
Liked 10,449 Times
in
7,248 Posts
.
...I don't think the crank with Biopace is a problem, but there are some limitations on what a short cage Cyclone rear derailleur will handle.
The ones with a short cage and a very short mounting ear off the dropout will only handle 24 cogs reliably, IIRC. Look on Velobase.
...I don't think the crank with Biopace is a problem, but there are some limitations on what a short cage Cyclone rear derailleur will handle.
The ones with a short cage and a very short mounting ear off the dropout will only handle 24 cogs reliably, IIRC. Look on Velobase.
#5
Senior Member
Join Date: Oct 2014
Location: Portland, OR
Posts: 13,056
Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder
Liked 4,085 Times
in
2,642 Posts
Biopace versus Cyclone
The battle of comic heroes?
Like said above, I'd just check to make sure you have the required capacity for the derailleurs. Set it up then try all combinations. I"d be very surprised if it didn't work just fine.
Ben
The battle of comic heroes?
Like said above, I'd just check to make sure you have the required capacity for the derailleurs. Set it up then try all combinations. I"d be very surprised if it didn't work just fine.
Ben
#6
Mechanic/Tourist
Biopace has no impact on derailleur choice - they all shift equally (poorly). You left out the variables that do - chainring sizes. However, considering the limited selection of chainrings in that era you are probably fine there also.
#7
tcarl
Until recently I had a shimano biopace 42-52 road crankset on a bike with a suntour Superbe front derailleur and Suntour barcon (friction) bar end shifters. It shifted just fine. It sounds like your proposed setup would be similar.