Is This Normal? - Rear Wheel Hub-Frame Spacing
08-07-09, 02:24 PM
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Is This Normal? - Rear Wheel Hub-Frame Spacing
Hi all,
Im upgrading my rear hub from the crappy quando freewheel hub i have to a freehub(for the cogs with fewer teeth)
I noticed something strange, its certainly different on my mountain bike. Take a look-
This seems to be problematic considering most hubs today are quick release, they dont seem to have that much clearance on that side, its an aluminium frame so squashing it aint gonna be good.
Maybe im just wrong.
Having seen that, are there any special considerations i need to make when buying a new rear hub?
Also are there any measurements i need to take so that i dont need different size spokes?
Im upgrading my rear hub from the crappy quando freewheel hub i have to a freehub(for the cogs with fewer teeth)
I noticed something strange, its certainly different on my mountain bike. Take a look-
This seems to be problematic considering most hubs today are quick release, they dont seem to have that much clearance on that side, its an aluminium frame so squashing it aint gonna be good.
Maybe im just wrong.
Having seen that, are there any special considerations i need to make when buying a new rear hub?
Also are there any measurements i need to take so that i dont need different size spokes?
08-07-09, 02:40 PM
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well there are a couple questions in here... is this picture we are looking at the mountain bike in question? what exactly is strange? are you referring to the distance from your hub body to the frame (i.e. the fat spacer in there)?
are you planning to buy a new rear wheel or just the hub?
if you are buying a new wheel, just make sure the spacing between the frame dropouts is correct. it looks like it's probably 135mm (especially if it's a MTB) but you can just take a tape measure and find out for sure. frames should either be 120, 126, 130, or 135mm. as long as your new wheel has the same spacing it should slide in just fine.
if you are planning to build a wheel... have you ever built a wheel before? there are a lot of numbers that go into having the right size spokes, and the chances of finding a new hub that fit the same spokes are slim, along with the general recommendation by many to not rebuilt a wheel with old spokes. you need to know the flange diameter, number of spokes, offset (left and right). if you don't know what these measurements are i recommend reading sheldon brown's wheel building article on his website.
that said, unless you just want the experience, it will probably be just as cheap or cheaper to buy a whole wheel than a new hub AND new spokes.
are you planning to buy a new rear wheel or just the hub?
if you are buying a new wheel, just make sure the spacing between the frame dropouts is correct. it looks like it's probably 135mm (especially if it's a MTB) but you can just take a tape measure and find out for sure. frames should either be 120, 126, 130, or 135mm. as long as your new wheel has the same spacing it should slide in just fine.
if you are planning to build a wheel... have you ever built a wheel before? there are a lot of numbers that go into having the right size spokes, and the chances of finding a new hub that fit the same spokes are slim, along with the general recommendation by many to not rebuilt a wheel with old spokes. you need to know the flange diameter, number of spokes, offset (left and right). if you don't know what these measurements are i recommend reading sheldon brown's wheel building article on his website.
that said, unless you just want the experience, it will probably be just as cheap or cheaper to buy a whole wheel than a new hub AND new spokes.
08-07-09, 02:41 PM
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So long as the new hub has:
45 mm hole-hole radius as the Quando
135 mm axle/locknut spacing as the Quando
You can resuse the spokes as-is...
Most generic freehub hubs like mine - and even the Shimano's - are 45mm / 135mm with the same 33.5 20.5 offsets.
Don't sweat...
=8-)
45 mm hole-hole radius as the Quando
135 mm axle/locknut spacing as the Quando
You can resuse the spokes as-is...
Most generic freehub hubs like mine - and even the Shimano's - are 45mm / 135mm with the same 33.5 20.5 offsets.
Don't sweat...
=8-)
08-07-09, 03:08 PM
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(Correction: Make that spoke hole diameter - not radius. DOH!)
