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The problem is that if you're running a Shimano 600 system, you've probably got a 5 or 6 speed drivetrain and the lowest number of speeds on a modern brifter [integrated shift+brake lever] is 7 (the Shimano Tourney brifters are 7 speed). So you'd need either downtube shifters, bar end shifters, or stem shifters (all of which likely will operate in friction ...


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You will be fine with an 8-speed cassette, as long as you also think about compatible shifters. As regards the chain width, 6-, 7- and 8-speed are all interchangeable. 9-speed and above, the chain becomes narrower to cater for the extra sprockets on the cassette. As exemplified by @Batman's answer, there is an amount of scepticism regarding how much this ...


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Rear derailleur's speed markings are generally for marketing purposes - if you're under 10 speed in Shimano, you can swap between road and mountain rear derailleurs without problems provided they have enough capacity for the rear cog combination you're using - the cable pull is the same, so road and mountain shifters can't tell the difference (often in fact, ...


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Pretty much any 8 speed Shimano-compatible bar end shifter will work if you're running a Shimano drive train (If you're running SRAM, you'd obviously need a SRAM compatible one). Those will work, as will the ones from Microshift 8 speed among others. You'll need to re-run your cables, obviously, though.


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If expoxy doesn't work, you won't need to replace the complete set. Left-hand STI shifters (for front derailleurs) tend to be more durable and reliable than right-hand shifters, Front derailleurs are used less frequently than the rear. As a result, left ones are easier to find and cheaper on eBay. Right now there is an "almost new" LH Sora ST-3304 on ...


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One thing downtube shifters will let you know right away is if your position is setup with your weight too far forward. If you've got too much weight on your hands it will be very difficult to take one hand away without first sitting up. If you want to make life simpler, replace the cog set on the back with a more modern Freewheel that has hyperglide cogs. ...


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Spend some time on the bike, if your bike has down tube shifters I would suggest riding in a low position and get used to the balance of the bike when letting go with one hand. It doesn't take long and you'll have no problem at all. Simply ride only this bike for a couple of weeks and you'll be all set. After that go ahead and ride both. I have two bikes as ...


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Most shops don't carry spare parts for STI shifters. Most problems are internal and even if you can get spare parts, the cost in labor to replace most things (except clamps, hoods, and name plates) coupled with the cost of the spares exceeds the cost of a whole new unit. The piece you need is called an outer support unit. Shimano does have part numbers for ...



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