Syntace X-12 x 148 ...
 

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Syntace X-12 x 148 Boost thru axle

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 bubs
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Are these all the same?  Any reason to spend £45 on one for my Cotic Soul from Cotic or £20 ish from elsewhere?  Really don't know how my shed of doom hides such things 🙁

 
Posted : 12/09/2025 12:29 pm
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As long as the length is correct then get it from where ever.

 
Posted : 12/09/2025 12:40 pm
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I may be wrong, but I'd also be checking thread size, pitch and length.

 
Posted : 12/09/2025 12:42 pm
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Posted by: submarined

I may be wrong, but I'd also be checking thread size, pitch and length.

You are correct. Found this when buying a new axle to fit a bike trailer. Thankfully both of my bike have the same pitch so only needed one axle for both.

Google's AI suggests the Soul has a pitch of P1.5, but I'd get proper confirmation on that before ordering anything.

 

 
Posted : 12/09/2025 12:48 pm
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Posted by: submarined

I may be wrong, but I'd also be checking thread size, pitch and length.

Normally I'd also recommend this but IIRC the Syntace compatible axles have only one thread/pitch combination.

 

 
Posted : 12/09/2025 12:51 pm
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Ooo... where are the Syntace ones £20?

(ideally actually in stock and in the UK)

 
Posted : 12/09/2025 1:23 pm
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I saw the Syntace ones on Winstanleys.

are they any different to the Decathlon ones?

https://www.decathlon.co.uk/p/12x148-mm-1-5-mm-thread-boost-format-rear-wheel-steel-thru-axle/_/R-p-332455

 
Posted : 12/09/2025 1:52 pm
 bubs
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Thanks all. 

Winstanleys and Paul's but warehouse stock and so perhaps not actually available 🤔.  7 day dispatch and so I guess I'll see (or find my original one just after I pay). 

 
Posted : 12/09/2025 2:00 pm
 bubs
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Posted by: greatbeardedone

I saw the Syntace ones on Winstanleys.

are they any different to the Decathlon ones?

https://www.decathlon.co.uk/p/12x148-mm-1-5-mm-thread-boost-format-rear-wheel-steel-thru-axle/_/R-p-332455

Yes, they are different.  The Syntace ones have a tapered thread and need a special nut in your frame (I think). 

 

 
Posted : 12/09/2025 2:12 pm
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If I needed to buy a new rear thru-axle I think I'd be tempted to get one of these, knowing I could swap it round between any/most frames that had the same pitch thread (the ability to mount a rack would be a bonus):

https://uk.ortlieb.com/products/thru-axle-m6-connector

 

 
Posted : 12/09/2025 3:35 pm

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