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First Square Taper

Product code: 11749

£9.16RRP: £10.83(Save 16%)

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First Square Taper

No frills sealed bearing square taper bottom bracket from First.

- Maintenance-free sealed cartridge assembly with extra seal keeps out dirt, mud, and water.
- Also allows installation without adjustment.
- Ideal choice for trials riders using square taper cranks due to its solid axle, good price, and relatively low weight.
- Steel cups for maximum durability.
- Does not include crank bolts.
- Available in 68mm x 128mm.
- Weight: 379.3g (Incl. bolts)



Would this bottom bracket fit my Monty 221ti frame ?

Posted by andrew on 28/01/2014

Reply from TartyBikes on 29/01/2014

Hi Andrew - thanks for your question. This bottom bracket will fit your frame just fine. The only thing to consider is that there have been versions of the bike with square taper BBs, and some with ISIS. If you have a 2005 or earlier model, it will likely be square taper - otherwise, it'll probably need an ISIS. If you haven't already, it would definitely be worth checking that! Hope that helps. Thanks, Flipp.


Hi.. will this BB fit my Koxx level boss 20"long? im not sure about the year of the frame but i belive its from 2008. I had ISIS on the bike before but it broke and i would like to change to square tapper this time.. havent been riding for 4 years and would rly like to fix the bike.. also can you give me a tip for crankset and freeweel that will fit good? it would be great! Cheers from Sweden!

Posted by Mikko on 20/03/2014

Reply from TartyBikes on 20/03/2014

Hi Mikko - thanks for your questions. This should fit your frame absolutely fine. As for cranks, the Trialtech Sport Forged 160mm are incredibly well proven amongst riders and are trusted by many. They are known for their longevity and strength. Finally, by far the most popular freewheel we sell is the Echo SL which is also very reliable. If you were looking for something a little cheaper, the Rockman 72 click is just as reliable as the Echo, but features a few less engagement points. Hopefully this will help! Thanks, Flipp.


would this fit my onza pro 2011 (blue frame)? thankyou

Posted by Dan on 08/08/2014

Reply from TartyBikes on 08/08/2014

Hi Dan - yes, this would fit your frame just fine. Thanks, Flipp.


Hi there, would this fit my onza t- bird (not sure on age, silver frame with hs33)? Thanks

Posted by Tom on 01/06/2015

Reply from TartyBikes on 02/06/2015

Hi Tom - yes, this will fit your frame just fine! Thanks, Flipp.


Hi. Will it fit to my fourplay and trialtech square taper 24t crankset? And if I buy 68x122m it will fit?

Posted by Andrew on 27/02/2016

Reply from TartyBikes on 29/02/2016

Hi Andrew - A 122mm crankset should give you just enough clearance - I would recommend using a 128mm BB to ensure you've definitely got good clearance for both the cranks and the chainring though. Thanks, Mark

Ross La Trobe

Hi, would this BB fit my Onza bord 2012? Thanks Ross.

Posted by Ross La Trobe on 24/08/2014

Reply from TartyBikes on 26/08/2014

Hi Ross - yes, this would fit your bike just fine. Thanks, Flipp.


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