Crank: How much play is ok?
Discussion
Yeah, way too much play. Drop by your LBS, might need a new BB (and maybe new cranks if this play has damaged the crank threads/splines).
Depending on the age of your bike the bearings inside the BB aren't really designed to be replaced.
Depending on the age of your bike the bearings inside the BB aren't really designed to be replaced.
Edited by AndrewEH1 on Sunday 30th October 19:39
Your bottom bracket has a slight bit of play in it, these are inexpensive, and easily changed with the right tools. There's a chance that the excessive friction may cause global warming and destabilise the fragile ecosystems of the Earth, thus rendering it barren to all life. Best get down to your LBS before Armageddon strikes us all dead...
As above bet it is the BB, especially if it is the new shimano outer shell ones
My winter bike gets through one every 10 months, but they are only £16
I often only realise when the bike starts "clanging" over rough surfaces and Ive had play in it for months before I got round to sorting.Ive never had one go completely on me, just more and more play
My winter bike gets through one every 10 months, but they are only £16
I often only realise when the bike starts "clanging" over rough surfaces and Ive had play in it for months before I got round to sorting.Ive never had one go completely on me, just more and more play
ecsrobin said:
Devil2575 said:
I'll see if I can split the crank. It hasn't stood up to well to neing used through two winters.
It's a 2013 bike.
What bike is it?It's a 2013 bike.
If it's a square bottom bracket you could be looking at new cranks and BB from past experience.
A work mate has had a look at it and is going to lend me the tools to strip out the BB. He also thinks that it's fooked.
Got my BB out and it's fooked.
I can get a straight replacement for £10
Or is it worth spending more to get a better one? The bike is going to be my winter commuter so it has to put up with salt and general abuse. Will a more expensive BB cope much better or is it just worth factoring in the cost of chsnging it more regularly?
I can get a straight replacement for £10
Or is it worth spending more to get a better one? The bike is going to be my winter commuter so it has to put up with salt and general abuse. Will a more expensive BB cope much better or is it just worth factoring in the cost of chsnging it more regularly?
Devil2575 said:
Got my BB out and it's fooked.
I can get a straight replacement for £10
Or is it worth spending more to get a better one? The bike is going to be my winter commuter so it has to put up with salt and general abuse. Will a more expensive BB cope much better or is it just worth factoring in the cost of chsnging it more regularly?
Check your crank arms as well. They are likely to also be damaged if a square tapered is damaged. I can get a straight replacement for £10
Or is it worth spending more to get a better one? The bike is going to be my winter commuter so it has to put up with salt and general abuse. Will a more expensive BB cope much better or is it just worth factoring in the cost of chsnging it more regularly?
From experience, there is nothing wrong with a square taper bottom bracket. I've also found them to actually last a lot longer than the more modern replacements. Realistically, you're going to be looking at £50-£60 for a new chainset and bottom bracket if you upgrade to a Shimano Deore. It will be an improvement, but probably not a very noticeable one.
I'd pay the £10 for a replacement and make sure it's well greased, then when that one wears out you'll probably be ready for a new chainset as you'll need to replace the chainrings by then too.
I'd pay the £10 for a replacement and make sure it's well greased, then when that one wears out you'll probably be ready for a new chainset as you'll need to replace the chainrings by then too.
AndrewEH1 said:
Honestly if it was me I'd upgrade to an ISIS BB, you'd need new cranks too though.
You must be mental. Isis, octalink, and all those interim standards were utter crap - the larger axles requiring the use of smaller bearings. I guarantee any bike shop mechanic would NOT recommend that.
Shminano UN52 in the right size, job done.
The only 'upgrade' would be to change to a modern external bearing type (e.g. Hollowtech II), but that is a bigger spend and wholly un-neccasary.
Even a £15 Shimano UN52 will be an upgrade over what the bike was supplied with as stock.
Make sure its fitted properly, the right size, and the crank bolts are torqued correctly.
just budget to change every year tbh thats what i do
If I ever had one badly fail id change that view, but i have not so just treat as a consumable
My campy bike has a Hope expensive BB will see how that lasts in comparison
Ive had square tapers last years of hard abuse
If I ever had one badly fail id change that view, but i have not so just treat as a consumable
My campy bike has a Hope expensive BB will see how that lasts in comparison
Ive had square tapers last years of hard abuse
Edited by TwistingMyMelon on Tuesday 8th November 11:34
snotrag said:
You must be mental. Isis, octalink, and all those interim standards were utter crap - the larger axles requiring the use of smaller bearings.
+1. I had a bike come with Isis, it was garbage. I replaced it with a square taper crankset that a mate gave me out of his bits box, it's still in use now. The Isis BB and cranks are now in MY bits box looking for a home.timnoyce said:
From experience, there is nothing wrong with a square taper bottom bracket. I've also found them to actually last a lot longer than the more modern replacements. Realistically, you're going to be looking at £50-£60 for a new chainset and bottom bracket if you upgrade to a Shimano Deore. It will be an improvement, but probably not a very noticeable one.
I'd pay the £10 for a replacement and make sure it's well greased, then when that one wears out you'll probably be ready for a new chainset as you'll need to replace the chainrings by then too.
I was actually just thinking of a more expensive version of the same type of BB.I'd pay the £10 for a replacement and make sure it's well greased, then when that one wears out you'll probably be ready for a new chainset as you'll need to replace the chainrings by then too.
I'm not spending a lot upgrading this bike as it is only going to be used for winter commuting.
+2 for not using ISIS. I hate it but have some cranks I love, and find myself going through BB's like there's no tomorrow.
The XT square taper that has been in my retro singlespeed for over 10 years is still spinning beautifully.
ISIS/Octalink are a prime example of a solution to a problem that didn't exist.
The XT square taper that has been in my retro singlespeed for over 10 years is still spinning beautifully.
ISIS/Octalink are a prime example of a solution to a problem that didn't exist.
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