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.
1948489
I think so. That bike looks like it has 25.4mm handlebars (http://www.specialized.com/us/en/bikes/mountain/hardrock/hardrock-disc-se-26#specs), which is fairly standard for newer bikes.
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.
2169979
My base is round and it fits fine. It also has the numbers 1020 on the bottom, if that makes any difference, not sure.
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)
1184144
Got home to late tonight to look and measure the outside width. This came to our family account. If you still need the information send me a note to my e-mail. It's oldbiker66@yahoo.com in the subject line mention it's from amazon question.
373348
I can't help you. You may want to take the bike to a bike shop and see what they say. You will probably have to take the old one out and measure it to be sure.
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.
171859
If you're talking about a square taper bottom bracket, no I believe you'll have to buy a bottom bracket separately.
1335466
they sent me a 27.2 when I ordered a 26.8... they had told me it was indeed a 26.8 when I asked them BEFORE I purchased... they refunded my money... ask them before you buy it! I wanted one for my old diamondback ascent mtb.... i'll just keep riding the nice aluminum one I found elsewhere for now, besides, the weight is almost the same within a few grams....
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.
860519
I am not familiar with that bottom bracket. My fist question is : is that a square taper style bottom bracket? That's what you need at the most basic level . there are other factors that come into play : straight road bike style chInstays or MTB style chainstays .can you replace the spindle on that bottom bracket if nessary? That might be the only way to decide the correct spindle for your bike and the sugino crankset. Or... Quick answer : take the whole thing to your local bike shop to see what they might say. I hope this helps. Perhaps there are some other amazon customers out there with experience with this bottom bracket?
860517
I am not familiar with that bottom bracket. My fist question is : is that a square taper style bottom bracket? That's what you need at the most basic level . there are other factors that come into play : straight road bike style chInstays or MTB style chainstays .can you replace the spindle on that bottom bracket if nessary? That might be the only way to decide the correct spindle for your bike and the sugino crankset. Or... Quick answer : take the whole thing to your local bike shop to see what they might say. I hope this helps. Perhaps there are some other amazon customers out there with experience with this bottom bracket? I am not familiar with that bottom bracket. My fist question is : is that a square taper style bottom bracket? That's what you need at the most basic level . there are other factors that come into play : straight road bike style chInstays or MTB style chainstays .can you replace the spindle on that bottom bracket if nessary? That might be the only way to decide the correct spindle for your bike and the sugino crankset. Or... Quick answer : take the whole thing to your local bike shop to see what they might say. I hope this helps. Perhaps there are some other amazon customers out there with... » Read More I am not familiar with that bottom bracket. My fist question is : is that a square taper style bottom bracket? That's what you need at the most basic level . there are other factors that come into play : straight road bike style chInstays or MTB style chainstays .can you replace the spindle on that bottom bracket if nessary? That might be the only way to decide the correct spindle for your bike and the sugino crankset. Or... Quick answer : take the whole thing to your local bike shop to see what they might say. I hope this helps. Perhaps there are some other amazon customers out there with experience with this bottom bracket? « Show Less
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.
1732430
We bought the Shimano UN55 BB Square Taper Bottom Bracket 68X107mm to use with Origin8 Square Top Track/Single Speed Crankset - 170mm x 46T Square Taper White.
1996720
Pedal spindles come in two measurements: 1/2" and 9/16". It may seem similar but when you hold them side by side it makes a big difference. The good thing is that most Shimano cranks have 9/16" ports for pedals. This one should be 9/16"
952871
I would call the S.R. Smith customer service number which you can get via google and speak to someone about the differences. Also, you need to make sure that your existing base has the correct holes which need to be measured. We bought a replacement and went with the less expensive option because it has MUCH more flex and are very happy with it. We do run a risk of it cracking more easily, but no problems yet, and a really stiff board just isn't fun so we are happy we switched.