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What are the sizes of the wrench & allen tools needed to work on shimano hg hubs?

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22K views 29 replies 6 participants last post by  Reaperactual  
#1 ·
Hello I have a Shimano FH-MT200-B 9x141mm(or similar Shimano FH-TX506 uses same freewheel) I believe this is a standard "HG" style shimano hub correct?

What are the sizes of the tools needed to disassemble the freehub? The size of the very thin wrench? Like a specialty super thin wrench that is like what 5mm thin? what size is that wrench?

Also the allen key that i need what size is it? It's like a thick allen key tool anyone know the size?

It's because I want to order these tools to have for myself.

Thank you in advance.
 
#3 ·
They're cheap to buy so suggest 3 cone spanners. Some are double ended and each end fits two sizes on some types. With 3 of these types you will have 13mm through to 18mm which will cover near enough any cone nuts you would ever come across for hubs.

Golden rule is never to touch the driveside cones, only adjust/remove cones on non drive side (easiest to get to on rear) to keep the axle central within the hub and an equal amount of exposed axle ends on both sides for the dropouts. đź‘Ť
 
#5 ·
Cone spanners is what they are called that's right. I see some double ended ones on amazon. Just not sure which size it is. I suppose I can get my regular open wrench and measure it then buy the spanner version for it? But the drive side cone is the one I would need to release because I am changing the freewheel hub itself from what i understand?
 
#10 ·
Not sure what you mean regarding two Allen key sizes, the freewheel body 12mm one? The one to remove the freehub from the hub is the only one fixing it in place which is hidden inside and the axle goes through it.

You might not be able to accurately measure the inner cone nut with a normal spanner/wrench that's why they require a thin cone wrench/spanner in the first place.

I suggest for the best chances for a fit is get two double ended to cover 13-16mm and hope you don't need the 17mm size.

There are also adjustable cone spanner/wrenches you could buy but they're expensive for what they are. 🤔
 
#11 ·
Reaperactual said:
Not sure what you mean regarding two Allen key sizes, the freewheel body 12mm one? The one to remove the freehub from the hub is the only one fixing it in place which is hidden inside and the axle goes through it.

You might not be able to accurately measure the inner cone nut with a normal spanner/wrench that's why they require a thin cone wrench/spanner in the first place.

I suggest for the best chances for a fit is get two double ended to cover 13-16mm and hope you don't need the 17mm size.

There are also adjustable cone spanner/wrenches you could buy but they're expensive for what they are. 🤔
Click to expand...
says 10mm hexagon wrench, & 12mm hexagon wrench. but it doesn't say anything about the spanner wrench size.

1913810
 
#14 · (Edited)
My guess would be you'll need 15mm going purely off memory. 🤔 Worth the cheap investment for your toolbox buying the cone spanner/wrenches to cover 13-16mm and ideally 17,18mm to be sure. Then you know one will definitely be the right size and they'll all come in handy for a few jobs including keeping f+r bearings serviced, maintained and running smooth for years if they're looked after.
 
#22 ·
#24 ·
{|xDi|} said:
Is this the right call? Check this link please

Check this out at Amazon Yuauy Double Ended 8 mm thru 19mm Cone Wrench Bicycle Tool Kit Spanner Bike Cycling Multi Set + 2 in 1 Cross Screwdriver & Slotted Screwdriver Yuauy Double Ended 8 mm thru 19mm Cone Wrench Bicycle Tool Kit Spanner Bike Cycling Multi Set + 2 in 1 Cross Screwdriver & Slotted Screwdriver - - Amazon.com
Click to expand...
{|xDi|} said:
Is this the right call? Check this link please

Check this out at Amazon Yuauy Double Ended 8 mm thru 19mm Cone Wrench Bicycle Tool Kit Spanner Bike Cycling Multi Set + 2 in 1 Cross Screwdriver & Slotted Screwdriver Yuauy Double Ended 8 mm thru 19mm Cone Wrench Bicycle Tool Kit Spanner Bike Cycling Multi Set + 2 in 1 Cross Screwdriver & Slotted Screwdriver - - Amazon.com
Click to expand...
Yes. Obviously not Park Tool (or similar) quality but for part of a tool collection to cover a home mechanic's occasional job requirements vs cost that sort of set is perfectly acceptable imo.đź‘Ť
 
#25 · (Edited)
Definitely stick to metric Allen key sizes. Ball head types do come in handy from time to time. Near enough all bike related jobs are somewhere between 1.5-10mm sizes.

Anything bigger than 10mm I'd buy as cheap as possible for very rare or even maybe a one off use.

My 11mm Allen key has been used once for replacing a freehub years ago but still got it, you never know, it might come in handy again one day, lol!?
 
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