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Replacement bottom bracket for a Dawes Horizon (2005)
I've worn out my bottom bracket. I have no idea what a suitable
replacement might be - any suggestions? Thanks, Daniele |
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Replacement bottom bracket for a Dawes Horizon (2005)
D.M. Procida wrote:
I've worn out my bottom bracket. I have no idea what a suitable replacement might be - any suggestions? Thanks, Daniele Shimano UN52 of the same length you currently have fitted or if not square taper, then maybe the next grade up on what is fitted |
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Replacement bottom bracket for a Dawes Horizon (2005)
Pete Whelan wrote:
I've worn out my bottom bracket. I have no idea what a suitable replacement might be - any suggestions? Shimano UN52 of the same length you currently have fitted or if not square taper, then maybe the next grade up on what is fitted Right... so how would I find out what length it is without taking it out? Or indeed whether it has a square taper? Daniele |
#4
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Replacement bottom bracket for a Dawes Horizon (2005)
D.M. Procida wrote:
Pete Whelan wrote: I've worn out my bottom bracket. I have no idea what a suitable replacement might be - any suggestions? Shimano UN52 or UN53 or UN72 or UN73 of the same length you currently have fitted or if not square taper, then maybe the next grade up on what is fitted Right... so how would I find out what length it is without taking it out? Or indeed whether it has a square taper? Length of axle can be measured by taking the cranks off (which you will probably need a special tool for). Hopefully someone will save you doing that by knowing what is fitted to your bike (which would be possible as you have mentioned the model and year). Sorry I don't know. Make or model of cranks will indicate whether it's a square taper type. ~PB |
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Replacement bottom bracket for a Dawes Horizon (2005)
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#6
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Replacement bottom bracket for a Dawes Horizon (2005)
D.M. Procida wrote:
I've worn out my bottom bracket. I have no idea what a suitable replacement might be - any suggestions? Shimano UN52 of the same length you currently have fitted or if not square taper, then maybe the next grade up on what is fitted Right... so how would I find out what length it is without taking it out? Or indeed whether it has a square taper? OK, I've done a bit more investigating. First, I can see something that looks as though this tool: http://www.parktool.com/products/detail.asp?cat=25&item=BBT-22 will fit into. Does that give any useful information about what kind of bottom bracket it is? I have one of those tools in my toolset. Unfortunately, I can't tell for certain whether it will fit, because I can't get the cranks off. I have a crank-pulling tool, but having tightened it as tight as it will go, nothing has budged. Second, the axle is square - is this what is meant by a square taper? It looks somewhat like this: http://www.parktool.com/images_inc/repair_help/crank04.jpg Finally, according to the Dawes website, newer versions of the same bike are listed as having Shimano bottom brackets. I don't know if this is useful in identifying what's likely to be on there. Daniele |
#7
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Replacement bottom bracket for a Dawes Horizon (2005)
D.M. Procida wrote:
OK, I've done a bit more investigating. First, I can see something that looks as though this tool: http://www.parktool.com/products/detail.asp?cat=25&item=BBT-22 will fit into. Does that give any useful information about what kind of bottom bracket it is? Not unless sure that is the exact tool that would fit. I have one of those tools in my toolset. Unfortunately, I can't tell for certain whether it will fit, because I can't get the cranks off. I have a crank-pulling tool, but having tightened it as tight as it will go, nothing has budged. It's a two-part process. See the instructions on Park Tools. Second, the axle is square - is this what is meant by a square taper? Yes, so we're getting there. We can find out what the axle length /probably/ is just from the model of cranks. Are they marked with a name or number? Look on the back as well as front. ~PB |
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Replacement bottom bracket for a Dawes Horizon (2005)
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Replacement bottom bracket for a Dawes Horizon (2005)
On May 6, 11:36*pm, (D.M.
Procida) wrote: Unfortunately, I can't tell for certain whether it will fit, because I can't get the cranks off. I have a crank-pulling tool, but having tightened it as tight as it will go, nothing has budged. Be careful here as you have the potential to destroy your cranks. The pulling tool has two parts, a body that screws into the crank, and an inner part that screws into the tool. Make sure the inner part is unscrewed almost all the way out before you screw the tool into the crank. Then make sure the body of the tool is all the way into the crank. Only then should you screw in the inner part. There will be some temporary resistance then the crank should come off easily. If the body if the tool is only a few threads in it will strip the threads from the crank then you will be in for a torrid time. -- Dave... |
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Replacement bottom bracket for a Dawes Horizon (2005)
Tim Hall wrote:
There are two bits to tighten: the first attaches the tool very firmly to the crank, the second then pushes the crank off the end of the axle. If you've done that bit right and it still doesn't shift, try a bit of Plus Gas and waiting overnight. Or a bit of gentle heat. Having left it overnight with penetrating oil, still nothing has budged. I've tried again, as hard as I dare. I'll try heating up the crank with a hot air gun next. Daniele |
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