My square tapered bottom bracket (stbb) is 68/122.5. I have an old 1999 Specialized Hardrock that uses a VERY primitive looking stbb (like ball bearings, and couple of rings) that looks nothing like on the picture. Would it still work? Thank you for...
62011
if you have the old style or AMERICAN style, that is NOT threaded inside the frame, punch out the races and use the TRUVATIV BB conversion! YOU WILL BE VERY HAPPY YOU DID! There are a TON of videos on how to do this, check out bikeman (I think that is his youtube handle) and you wont be let down! JUST MAKE SURE YOU INSTALL THE DRIVE SIDE PROPERLY AND LINE UP THE CONVERSION BEFORE YOU SEAT IT INTO THE FRAME! The screws to the conversion will pull it TIGHT but make sure it is in far enough to not strip the screws or adapter! THIS BB is one of the best values in the industry! I dont recommend any UNDER this model, even though they are VERY RELIABLE. THIS is a small price to pay and while you are there, I recommend an upgrade to your crank set to bring you an upgrade that will breath life into that nice HARDROCK! IF YOUR FRAME IS ALREADY THREADED, no worries, this should work!
859508
Check Shimano's documentation for maximum tooth difference for the 2300 RD. Chances are it'll work, or at worse, only support the 28t in the small chain ring. The cheapest option, of course, is to pedal harder.
1417602
Yes. It takes the modern square tapered spindle. I used a Sunlite tapered spindle bottom bracket unit for mine.
171220
You need to make sure first that your bottom bracket supports square-tapered cranksets. Then also you need to make sure of how many speeds your bike has. This setup is pretty standard so if you can fit square Taper and have 3x8 speed then it will work
716773
I used this one: Shimano UN55 BB Square Taper Bottom Bracket (68x110mm)it is a 110mm length BB.
850911
It has a lot of adjustment points. Three holes for the height on the bottom spars. At the top, the connecting arms are adjustable an the horizontal axis. It seem to me that it should work on most hard-tail MTB frames and wheel sizes (26, 27.5, 29)
2250915
Measure the width of your bottom bracket. It should be either 68 mm or 73 mm. _2.67 inches or 2.87 inches ) Good Luck !!!!!
1417601
It is for a square taper bottom bracket. Do note that the crank arms are a little shorter than standard adult 170mm to 175mm arms.
509301
there should be a label on the bottombraccet itself with all the specs on it. if you cant find the info on the specialized web site the simplest is to remove the bottom bracket and take the info from there.
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.
15227
My first suggestion is to read all the previous answers on the UN55 before you attempt to replace your bottombracket assembly. If you can remove the spindle, look to see if the specifications of the spindle are embossed on the spindle itself. For example, my Shimano spindle has specifications of 68 - 122.5 embossed on it, the smaller number is the bottom bracket bearing tube width and the larger number is the actual spindle length. Then select the UN55 sealed bearing BB that is the closest to your measurements.
716774
Sorry, I can't find a record of my Bottom Bracket order but would recommend checking out this page for advice.http://sheldonbrown.com/bbsize.html
373352
I googled it and it says its a 68mm english bottom bracket. Depending on what crank your going to use will decide on what shaft length to use on your bottom bracket. Once again.... DO YOUR HOMEWORK!!!
1453401
I'll give it a try, 1.5" bit does seem a bit large for the radius on the corners of the plate. I have not received the lift yet so I'll wait till I get my hands on it. I have a 1.5" forstner bit so that should be no problem. Thanx for the info.
2278239
I thought it was a weird question until I looked up "Bb68 73" and found this...Shimano XT SM-BB70 Hollowtech II Bottom BracketLooking at the pictures on the left...Now that's weird.
1182292
The diameter won't likely be your problem. The length was the issue for me. It was a little too long, and wouldn't lock. However, I was able to grind part of the bolt off and get it to work. You might want to measure the space between your forks to get a better idea it it will work for your bike.
1204758
Sure. Several things to check first: your bottom bracket must be a 'square taper' axle to fit the square taper holes in the crank. You will need to adjust the front derailleur upwards to clear the big chain ring, make sure your frame will allow that. Also, you may have to add links to the chain. Some frames will have water bottle braze-ons in the way, some suspension frames may have tubes in the way. If your bike has a triple crankset now, you can adjust your shifter to accommodate the double chainrings. Beyond those simple things to check, this crank should bolt on and work fine with your 7-spd cassette. Sure. Several things to check first: your bottom bracket must be a 'square taper' axle to fit the square taper holes in the crank. You will need to adjust the front derailleur upwards to clear the big chain ring, make sure your frame will allow that. Also, you may have to add links to the chain. Some frames will have water bottle braze-ons in the way, some suspension frames may have tubes in the way. If your bike has a triple crankset now, you can adjust your shifter to accommodate the double chainrings. Beyond those simple things to check, this crank should bolt on and work fine with your... » Read More Sure. Several things to check first: your bottom bracket must be a 'square taper' axle to fit the square taper holes in the crank. You will need to adjust the front derailleur upwards to clear the big chain ring, make sure your frame will allow that. Also, you may have to add links to the chain. Some frames will have water bottle braze-ons in the way, some suspension frames may have tubes in the way. If your bike has a triple crankset now, you can adjust your shifter to accommodate the double chainrings. Beyond those simple things to check, this crank should bolt on and work fine with your 7-spd cassette. « Show Less