What is the maximum chainring tooth capacity and is this bottom or top pull?
1604538
The Shimano Sora 9-speed shifter can be used up to a 50-tooth capacity on the large gear, if you are very careful on the installation, so the cage just clears the teeth when shifting. This is a bottom pull (ie. the cable pulls the linkage from the bottom/lower direction.) I was pleased with this replacement unit, since my original derailleur broke, right at the spring retainer nub, which cannot be repaired.
752559
Park tool BBT-9 will work or an integrated shimano GXP open ended bottom bracket wrench (Pedro's or Shimano or Bike Nashbar). I like the BBT-9 since it grabs all the way around the bracket but the others will work as well, but you have to take off the crank, the integrated wrench allows you to re-tighten without pulling the crank. Make sure you grease the threads for easy installation, Phil's waterproof synthetic or Finish Line teflon will do.
448957
Perfectly, I had one installed with the large chainring of 46 teeth. It works without any problem if well installed at the proper height.
91853
You need to check a couple things. Bottom pull or top pull? Diameter of clamp too- does it fit around your seat tube? Buying a front derailleur isn't that straight forward unfortunately. Lots of designs.
59118
This crank set is for a square taper bottom bracket. I bought an Avenir Octalink Crank Puller from Amazon.
1920282
The 2th number in the total shaft length in mm. Take the old bottom bracket out and measure it or run the model number to get the specs. If it's a newer bike you might be able to track down the bottom bracket specs online. If it's a frame with no bracket to measure and you can't get the bike specs online "take it to a shop". Also you need a special tool to remove/replace the bottom bracket. Good luck buddy!
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.
1729243
I use it on the largest chainring so it covers the 32T sprocket perfectly. I'm sure it could handle a 34T if that's what you have but it's sized to be just a little bigger than the 32T ring.
1665103
The 175mm is just the crank arm length. A crankset includes chain rings, bb, crank arms. If you don't need a set just look for the chain rings. Make sure they are correct though.
13411
Not hard at all. Shifting to a higher chainring requires very little effort. It's my assumption that your current cables are worn causing internal friction that makes shifting difficult. This new shifter includes new cables as well.
2093136
Its the lengh of the crankarm. Bigger frames usually request 175mm arm but the pedals will be lower to the ground on the bottom of the stroke
813241
Make sure that the capacity of this derailleur meets your requirements for the big cog. Other than that, new shifter (only need one since you're eliminating the front derailleur), new cassette (if you're on a 3x8 there is a chance you have a free wheel vs a free hub in which case you may need a new rear wheel. If your crank isn't serviceable (I.e. Riveted chainring vs. bolted, you will need a new crank and possibly a new bottom bracket if the chain line is changing. Usually a good idea to run a chain guide on the 1x also, even though this derailleur pulls tight and doesn't bounce much at all (maybe replace defunct chainring with guide?). Sounds like a fun project, enjoy! Make sure that the capacity of this derailleur meets your requirements for the big cog. Other than that, new shifter (only need one since you're eliminating the front derailleur), new cassette (if you're on a 3x8 there is a chance you have a free wheel vs a free hub in which case you may need a new rear wheel. If your crank isn't serviceable (I.e. Riveted chainring vs. bolted, you will need a new crank and possibly a new bottom bracket if the chain line is changing. Usually a good idea to run a chain guide on the 1x also, even though this derailleur pulls tight and doesn't bounce much at... » Read More Make sure that the capacity of this derailleur meets your requirements for the big cog. Other than that, new shifter (only need one since you're eliminating the front derailleur), new cassette (if you're on a 3x8 there is a chance you have a free wheel vs a free hub in which case you may need a new rear wheel. If your crank isn't serviceable (I.e. Riveted chainring vs. bolted, you will need a new crank and possibly a new bottom bracket if the chain line is changing. Usually a good idea to run a chain guide on the 1x also, even though this derailleur pulls tight and doesn't bounce much at all (maybe replace defunct chainring with guide?). Sounds like a fun project, enjoy! « Show Less
718037
Forgot sprocket count havr them on old schwinns contenental and tall mans varsity w/3 sprocket cranks. Haul grandkids in child seats so I like mountain bike cranks. Rivited large to nexy largest. Iweihh 350 & haul 75 more in grand kids. Have no problems with rivets. 2nd gear is 28. Biggest jump of all to 34.
1479584
Base of teeth are 0.080 thick and an 8-spd chain has a fair amount of wiggle on the teeth. That's all I've got. I'd check to see what the late Sheldon Brown says.
53860
As important as verifying that it has square bottom-bracket fitting, which it likely has, is making SURE the gear-teeth/ratios numbers match..whatever your old one is, it will create problems and more work if you try to fit one smaller or larger number of teeth, the front derailleur will not be in the right position and adjustment for a start...if your largest cog is 42T, you will be easier off with another with 42T, best to get the middle gear the same such as 34T or 32T, as well.
944087
I replaced the BB ON MY Gaint/ Boulder SE Mt. bike, my cranks had a female fine thead on the cranks arms my puller threaded into the cranks then the bolt on my puller screw into the puller and push against the square taper shaft on the bb and remove the cranks on bb. you may have to remove dust covers on crank arms to see thread on the cranks
502679
For what it is worth, I weight over 200 lbs and after a year of use, I have had to do almost nothing to maintain it. If you are really worried about the durability, just get it over with and get the XT grade crank. I expect that the chain rings will go before anything else.