What derailed Do I use on a road bike?My bike has Shimano Tiagra GS 8 spd cassette. 12-23t I would like to change to an 11-34t and drop to a 22t sprocket from a 30t crank sprocket. What derailed do I need to make this work to make work. Crank sprocket and additional chain link recommend would be helpful as well. What derailed Do I use on a road bike?My bike has Shimano Tiagra GS 8 spd cassette. 12-23t I would like to change to an 11-34t and drop to a 22t sprocket from a 30t crank sprocket. What... » Read More What derailed Do I use on a road bike?My bike has Shimano Tiagra GS 8 spd cassette. 12-23t I would like to change to an 11-34t and drop to a 22t sprocket from a 30t crank sprocket. What derailed do I need to make this work to make work. Crank sprocket and additional chain link recommend would be helpful as well. « Show Less
390103
first, if your bike has road bike style crankset, then there are no 22t sprockets for it. though a mtb crank will fill a 22t. second a 32t cassette will get you up any hill with a 30t crank sprocket. also the 11-32 has a smoother gear ratio between sprocket then 12-34. If you decided to swap cassette, make sure that your chain is long enough as well as your derailleur cage.
390104
this is a mountain cassette it wont work. yhe hub is different (im pretty sure)
1308254
The problem isn't so much the seven speed cassette it's your rear drop out width. When road bikes went to 8 speeds the width was increased and is the standard today. An older seven speed frame has to be adjusted as in bent open to accept the newer wheel width.
1240158
It's rated to only 12-32 with a 41 tooth capacity: http://bike.shimano.com/publish/content/global_cycle/en/us/index/products/road/ultegra/product.-code-RD-6800-GS.-type-.rd_road.html . Capacity is the maximum sum of the differences on the front and the rear for example 12-32 rear and 34-48 front is 20 + 14 requires a 34 tooth capacity. So you're good on the capacity, likely, but exceed the maximum rating. Some people go well over the Shimano ratings, which are conservative to assure optimal performance, but at some point you hit trouble and it simply won't shift. One approach is to use a smaller little cog in the front. For example, I have 32-48 on one of my bikes, which in combination with a 12-32 gives me a 1:1 gear which should be good for steep dirt roads.
46037
I believe the photo is errant. What I received was a 7 speed. You definitely don't want to substitute an 8 speed on a 7 speed application. You'd have too much slack in the shifter cable (in position 8 on shifter) even if you adjusted the deraileur stops to avoid the chain falling off, and an annoying dead spot gathering up that slack when shifting back into the lower gears.
397523
Freewheels and cassettes are two different and non-compatible gear clusters for the rear hub of derailer bicycles. If you are buying a new gear cluster and are presently using a 7 speed cassette, best to buy a direct replacement cassette gear cluster. If you bought a cassette and found out your hub was older and used freewheels then those are also available. Go to the Sheldon Brown website for a more complete description of both gear systems.
1490216
Not enough information to tell you if this derailleur will work for you. Need an idea of the cable routing and if cabless pull from the top or bottom of the derailleur. Sorry I can't help you resolve this question. Nick Carper
224414
I do believe your present bike is also a 7 speed as is the freewheel your giving thought to purchasing. A special tool is needed to remove the current freewheel from your wheel. Best option, take your wheel and your new gears (freewheel) to a bike shop. They'll swap them out for a few bucks. Check the chain length after you replace the wheel. That freewheel is a good. I bought one myself. Ride safe. Have fun !
2214509
No problem regarding the 8 speed cassette. The front derailleur doesn't know or care how many sprockets are on the rear.You may have a slight problem regarding the chain. An eight speed chain is slightly wider than a nine. Adjustment will be more critical to avoid rubbing.
1778856
Dear cyclists friend, I was asking the same question myself. The WIFLI is a longer derraileur, that allows you to use a bigger cassette, up to 32 teeth. You will also need a new chain if you change your cassette and derraileur.
409240
The short answer is, yes. Shimano spacing is different for 6-11 speed cassettes, but cable pull ratio is the same for 6-9 speed. If you want indexing to work, you can only use an 8 speed cassette along with any 6-9 speed derailleur (except 8 speed Dura Ace derailleurs. This is info from my LBS and Sheldon Brown.) That said, in friction mode, you can use ANY brand or model derailleur set, because you stop the shifter when it engages the desired cog, not the other way around. It takes some fishing to get used to it, but after a while you will find each ratio as easily as if they were indexed using your own muscle memory. If you happen to find an old Positron or AX rear derailleur, you could conceivably have 5 speed indexing, because in those models the index feature was in the derailleur rather than in the shifter. Some other models for other people reading this: The model you need for Suntour indexing is the 6 speed Accushift "barcon" For all 7 speed Shimano, use the SL-BS50* For 8 speed Dura Ace, use the SL-BS50-8* or SL-BS77 For all 9 speed Shimano, use the SL-BS77 For all 10 speed Shimano, use the SL-BS79 *These frequently are sold NOS but ship in the wrong packaging so inspect these carefully before mounting to make sure you have the correct ones. The shift lever model is usually embossed on the rubber boot. In fact, the SL-BS64 kit usually ships in an SL-BS50 box, but don't be alarmed.
1441272
Changing from a 5 speed freewheel to a 6 speed freewheel will work if your rear derailleur is designed to work with a 28 tooth gear. The web site www.disraelligears.co.uk may give you this info.
255307
Unfortunately they don't put barrel adjusters on deraileurs anymore. SRAM started it and Shimano followed. You need an inline adjuster now...
1363923
First, I don't know. I have found calling Shimano Customer Service line to be very helpful when I had the same question. But in my experience as long as the number of speeds is the same, and the largest/smallest sprocket size is the same, you should be OK. Again, you should call Shimano to confirm. It is based on the derailleur, and in my case, I discovered from Shimano customer service that I was able to keep my same derailleur when I made my switch.
224416
I do believe your present bike is also a 7 speed as is the freewheel your giving thought to purchasing.A special tool is needed to remove the current freewheel from your wheel.Best option, take your wheel and your new gears (freewheel) to a bike shop.They'll swap them out for a few bucks.Check the chain length after you replace the wheel.That freewheel is a good. I bought one myself.Ride safe. Have fun !
1314380
it's a front derailleur... not a rear. that said, I bought this and use it with my 1997 Specialized stumpjumper which has an 8 speed cassette. works great.
461524
Katie, my tomasso road bike came with a 12-25 rear cassette which for most riders sort of standard. My problem with it is due to the amount of climbs in this area. I needed something easier on my knees as I'm pushing 50. I bought the 11-30 and it's much easier when I'm going uphill without pushing the red zone on my fitness pal. I probably would like the 11-32 but didn't want to have to change out on my rear derailer. So in summary the smaller gears are for in shape healthy young riders who can mash bigger gears. The 11-30 allowed me to gain more speed downhill and two gears extra on the steep parts which helps my knees and vox o2. Hope this helps Katie, my tomasso road bike came with a 12-25 rear cassette which for most riders sort of standard. My problem with it is due to the amount of climbs in this area. I needed something easier on my knees as I'm pushing 50. I bought the 11-30 and it's much easier when I'm going uphill without pushing the red zone on my fitness pal. I probably would like the 11-32 but didn't want to have to change out on my rear derailer. So in summary the smaller gears are for in shape healthy young riders who can mash bigger gears. The 11-30 allowed me to gain more speed downhill and two gears extra on the... » Read More Katie, my tomasso road bike came with a 12-25 rear cassette which for most riders sort of standard. My problem with it is due to the amount of climbs in this area. I needed something easier on my knees as I'm pushing 50. I bought the 11-30 and it's much easier when I'm going uphill without pushing the red zone on my fitness pal. I probably would like the 11-32 but didn't want to have to change out on my rear derailer. So in summary the smaller gears are for in shape healthy young riders who can mash bigger gears. The 11-30 allowed me to gain more speed downhill and two gears extra on the steep parts which helps my knees and vox o2. Hope this helps « Show Less
340275
The main thing is, SRAM REAR derailleurs will only work with SRAM REAR shifters, and vice versa. You can never use SRAM with Shimano in the back. It doesn't matter in the front.