I need a BB tool and the Park Tool looks good. Which of the two are preferable, the BBT-22 or BBT-32?
It appears the larger BBT-22 might be easier to work with (?)
BB Tool - Which one? BBT-22 or BBT-32
Re: BB Tool - Which one? BBT-22 or BBT-32
The BBT-22 allows you to use a 3/8" ratchet arm with it, which is very useful if you have such a thing: it allows you to get good leverage to undo a tight BB without slipping off the tool as spanners sometimes do.
[Amended 'cos I got them the wrong way round! ]
[Amended 'cos I got them the wrong way round! ]
Re: BB Tool - Which one? BBT-22 or BBT-32
PS Neither is a patch on the TacX T4415, which will get even the most stubborn cup undone, but sadly that's no longer made. There are a few still around though.
Re: BB Tool - Which one? BBT-22 or BBT-32
the 3/8" drive fitting on BBT-22 is mostly useful if you use a torque wrench during installation; it isn't really man enough for removing tight BB units. For high torque values you will be using the 32mm drive hexagon on the tool(s) anyway, so there isn't a big difference here.
However you may find one or the other easier to bolt onto the BB spindle so that it doesn't slip off; with BBT-22 you need the pedros tool (or similar) but with BBT-32 you just need a big penny washer between ~28 and 32mm OD; this can be used with a crank bolt to secure the tool.
There is a significant difference in how much of a cam-out load the tool sees; if you use the 3/8" drive square or the smaller end hexagon on BBT-22, the thrust is a long way offset from the spline, so the tool is trying to cam out. With BBT-32 the offset is much less so a single-sided drive tool isn't so likely to cause cam-out. BBT-32 is also a fairly faithful copy of the shimano tool, so it is arguably more likely to fit any future variants of shimano BB units.
cheers
However you may find one or the other easier to bolt onto the BB spindle so that it doesn't slip off; with BBT-22 you need the pedros tool (or similar) but with BBT-32 you just need a big penny washer between ~28 and 32mm OD; this can be used with a crank bolt to secure the tool.
There is a significant difference in how much of a cam-out load the tool sees; if you use the 3/8" drive square or the smaller end hexagon on BBT-22, the thrust is a long way offset from the spline, so the tool is trying to cam out. With BBT-32 the offset is much less so a single-sided drive tool isn't so likely to cause cam-out. BBT-32 is also a fairly faithful copy of the shimano tool, so it is arguably more likely to fit any future variants of shimano BB units.
cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
Re: BB Tool - Which one? BBT-22 or BBT-32
Brucey wrote:the 3/8" drive fitting on BBT-22 is mostly useful if you use a torque wrench during installation; it isn't really man enough for removing tight BB units.
I've found long-ratchet-arm (not the torque wrench) plus BBT-22 to be much more effective than spanner + BBT-32 on tight cups, and I've used both combinations on a lot of bikes in the workshop. I find it easier to press on it to hold it in place against the BB while turning the arm. I only use a retaining bolt in extremis. But each to their own.
Agreed that using a retaining bolt is the most secure way, though, which is why I'm so enamoured of my Tacx tool - the retaining bolt is built in and spring-loaded.
Re: BB Tool - Which one? BBT-22 or BBT-32
the problem is the 3/8" drive itself; most 3/8" drive tools are not rated much above 200ftlbs because a 3/8" drive square just shears off wholesale. I've put two or three times that much into a shimano BB tool, but I used a 3/4" drive socket on the tool to do it.
cheers
cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
Re: BB Tool - Which one? BBT-22 or BBT-32
Brucey wrote:the problem is the 3/8" drive itself; most 3/8" drive tools are not rated much above 200ftlbs because a 3/8" drive square just shears off wholesale. I've put two or three times that much into a shimano BB tool, but I used a 3/4" drive socket on the tool to do it.
cheers
Presumably you're only talking there about removing the BB, not installing it?
Re: BB Tool - Which one? BBT-22 or BBT-32
mikeymo wrote:
Presumably you're only talking there about removing the BB....
oh yes!
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~