Subject: Re: STI for Shimno 600 7-speed ? Posted by: Randy on December 16, 2000 at 13:41:47: In Reply to: Re: STI for Shimno 600 7-speed ? posted by Jim on December 09, 2000 at 10:29:02:

Message: >>Is there a Shimano Sti shifter set (whether still available or not), >>that can be retro-fitted to a Shimano 600 7-speed cassette/double setup ?...................................................................The original 7 speed RSX will work and will shift a double or triple. Any Shimano 8 speed other than dura ace will also usually shift a 7 speed cogset. The cog spacing between 7 and 8 speed is different,but close enough that it works. check www.harriscyclery.com for 7 speed rsx. I have the same situation. Through research and talking with a lot of different people, I learned that the Shimano Sora shifter in 8 speed will work. The Sora are durable and comfortable. My mechanic continues to have problems with older RSX shifters breaking down. Sora now makes a 7 speed for upgrades. I was told, it is possible that a new front derailleur will be needed, because the mechanism for shifting is different from the STI style. He suggested a 105 front derailleur, if it was needed. In other words...do some legwork, and consult an experienced mechanic to have the change made. I have an older Klein Quantum and my mechanic told me that the cost of an STI upgrade would be worth the investment (he bought a bunch of Sora 8 speed shifters at a great price, retail about $90). He said some people may be better off just buying a newer bike.