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 your patient. 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... » Read More 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 your patient. « Show Less
87862
I had a similar setup before switching over with no problems... BEST move I made was switching from the old to the UN55 Shimano BB...
87863
I put this one on a cheaper Huffy mountain bike with a solid straight shaft and a bearing set on either side! It was a great upgrade and worked perfect. Very simple to install and I think it should work on your bike with problem.
87864
Sounds like you currently have an 'adjustable BB' and upgrading to a cartridge BB is certainly a move in the right direction,chances are it will work, and if not, send it back.....no biggie....good luck.
1411336
I threw this very same Sunlite 103mm BB on an old Trek for the purpose of converting to single speed. Now depending on your frame..You may need a somewhat longer Spindle or BB.Or it could possibly be a Front derailleur adjustment issue.Good luck! Eddie
1054162
Can't find the specs but it almost certainly will work. Almost all older mtb cranks are the same bolt circle diameter.
511915
I just realized which trucks you were buying. Any standard 70 mm wheel and bearing kit is great. Get a riser and bolt length depending on how you are mounting them and how thick the riser is. I would recommend a full kit that includes everythung. Bearings are standard sizes. Sorry I didn't read through before answering.
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
42174
I can't say specifically. you need to measure the width of your bottom bracket. many sizes are available
698704
This crankset uses a standard, square taper, cartridge bottom bracket. It does not have an integrated axel like the newer, external bearing ones do.
937152
That's a pretty specific question. All I can say is that the crank sits fairly far out on the bottom bracket and I've ended up using short BBs like 118s or 123s.
373347
Hi Carlos; all the answers are good but I particularlly like Skips answer. I might add, Shimano UN55 is a square taper bottom bracket and the crankset has to be square taper also. Good luck.
59118
This crank set is for a square taper bottom bracket. I bought an Avenir Octalink Crank Puller from Amazon.
1673889
Example: 74x32T. The mounting bolt circle diameter on the crank is 72 mm. 32T indicates 32 teeth on the outside diameter of the chainring. Does this answer your question?
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.
1386916
"bottom bracket must measure 123mm from one end of the spindle to the other end " AND the bottom bracket must have the correct offset, measure from the center of the bottom bracket to the end of spindle. Many bottom brackets are symetrical (same length on each side), some frames are not, resulting in one crank leg sticking out a little further on one side. Often this is not a problem.
1165581
Sorry - I don't have this tire to check, but Continential only lists 27 x 1 1/4 with ISO 630x32. The general rule for bicycle tires IS fractional sizes and decimal sizes DON'T MIX. It's a valid question - although I'm not aware of that problem with 27" size, I have definitely experienced problems with old 26" sizes even within the same inch size designations. I suspect someone that was unaware of the mismatch issues just used the decimal designation by mistake. Best to check the ISO numbers of the old tire ( that did fit ) if possible - look at the larger number, that's rim diameter. In this case you want 630-xx (for a 27" tire). Good source for info on most things bicycle is sheldonbrown.com/tire-sizing.html
1184034
you need to measure the bottom bracket shell and the spindle on the old bottom bracket (it is most likely a 68mm x 115-120mm bottom bracket but measure to be sure) here is an image http://www.peterverdone.com/wiki/images/5/5f/Hollowtech-II-3.jpg and a handy chart http://sheldonbrown.com/bbsize.html
1999219
Hey Roy, I've never seen that on a BB. Is the old BB a three piece design? If you're moving to a cartridge style you'll have to measure, but likely a 118mm or 123mm spindle length will be what you need. Read this page http://www.parktool.com/blog/repair-help/chainline-concepts it will help.
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.