|Need climbing gear||mojo2367|
Aug 10, 2002 4:46 PM
|I have a mid 80's Pinarello Trevisio with full suntour superbe pro group. Freewheel is 7 speed. 11-21 which is fine for rolling terrain but I recently moved to a mountain town and am riding alot of mountain passes and it's killing me! So I need a biggergear in the rear . So my question is - will my superbe pro rear der push onto a 27 tooth gear (7 speed)? 2nd question -I was surprised that I was able to fit my buddy's 8 speed wheel into my drop outs- will the superbe pro der push an 8 or 9 speed cluster or will I need a different derrailleur? I'd like to keep the bike all suntour.|
|re: Need climbing gear||mmquest|
Aug 10, 2002 9:00 PM
|Don't know about your specific setup, but I have been using a 7 speed Ultegra with an 8 speed hub for a few years now. The derrailleur is a little finicky sometimes and the biggest cog doesn't really work because the derrailleur rubs on the spokes. But, if the wheel fits, why not give it a go and see?|
|yes, with the shimano 600 r der 7spd works as well as 8spd||PeterRider|
Aug 11, 2002 4:32 PM
|I've replaced a 1996 shimano 8spd 600 rear derailleur by an older (maybe 91-92) 7spd shimano 600 rear derailleur, it works exactly the same. Was probably the same model derailleur. |
|So what are you using for shifters?||Spoke Wrench|
Aug 11, 2002 5:35 AM
|My bet is the derailleur will handle the 27 tooth cog, but it probably won't index very well unless you can find a Suntour spaced freewheel. Good luck.
Converting to 8 speed wouldn't be worth it to me considering the cost and limited benefit. I think you can still get 8-speed freewheels, but you'll have to respace your rear axle and redish your rear wheel. You will also increase your likelihood of bending a rear axle.
|re: Need climbing gear||Rusty Coggs|
Aug 11, 2002 5:41 AM
|Plenty of options in 7 speed freewheels with a bigger cog.Most are shimano index compatible,but suntour 7 speed spaacing was the same as shiano anyway.No problem with the suntour derailer and ability to shift 8 or 9 cogs,but if the system is not index,it isn't likely to work with index shifters.Big if, is how large a cog the suntour deralier will shift,but my guess is at least a 28.|| |