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.
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.
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....
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.
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!
610167
For most instances the medium option will work. Shimano actually calls them long cage and super long cage. The long cage model is usually used on 29ers with triple fronts and 36 tooth rear large sprockets but a medium will work on a 42 tooth 1x conversion.
373349
If its a standard frame it 68mm.Its a Euro frame it 71mm.And the width is determined by the crankset.If your using your old crankset( peddels and gears)Just measure the length of the old one that's your width. With crank arms removed.If your buying a new crankset use the width recomended by the manufacture.68 mm most common size for BB
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.
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
59866
I replaced the original crankset that comes with this bike (which is actually pretty bad) with a shimano tourney crankset (Shimano FC-A070 Crankset 50/34 x 170mm 7 spd Tourney Black Road Bike). The only special tool that you will need is a crank puller for square taper cranks. You can find a lot of different models in amazon. Any of them can do this job pretty well. Finally, you may need other ordinary tools such as an adjustable spanner and a socket set. And just make sure that the socket walls are not so thick (such as those used for heavy duty jobs), so that you can insert the socket to remove the protection bolt from the crankset (you can see the bolt by removing the plastic cap that covers the crank).
1252721
its going to make an old school crank, like a 1 piece design) adapt to a cartridge style bottom bracket, you decide the size of the bb, depending on the crank choice. hope that helps
29372
I think it's probably just the thing. My bike is 20" and all the stands I had before were cast aluminum and broke within a couple weeks. They cost >$25. This one is steel and cost a lot less and that was installed over six months ago. Good luck!I don't know what a 1 or a 4 means. I didn't pay attention to any size codes and don't know what I have, maybe I got lucky.(For once).
310693
I bought this to change a rusted up bridge on a 92' strat, the block was about 3/16'' too deep and 1/16th wider than original block, the tremolo holes do not line up if you decided to use original block with it.
1530209
This fork in here is a 1 1/8 non tapered. it works but you need to look for the tapered version.
654517
I really think it depends on your chainstay clearance, chainring and crank arms. What I did to figure that out was to use websites like this one: http://sheldonbrown.com/chainline.html to figure out what length bottom bracket best worked for my bike. If you are running a triple, you should be at 45 (I'm assuming you are because you specifically asked about a chainline of 45), but a double should be 43.5mm...and on and on depending on your bike and gearing. You can also adjust the spacers on the back axle as well, but this shouldn't be necessary if you know that your rear (sprocket end) is at 45mm, which is what you are trying to achieve (explained here: http://www.velodromeshop.net/index.php?p=page&page_id=chainline). Sorry, not an easy yes or no answer. Just check those sites out and do the measurements and you should be ok. Hope I helped...good luck!
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"
2032752
It will work on any length spindle ---- spindle length (axle length of bottom bracket) determines the chainline. However you must have a square taper bb for this crankset to fit. If your bb is Shimano , Truevative, Suntour, etc, you should have no problem. If you have an off brand bb there could be a pitch (slant of the taper) issue though.