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First ISIS with Bolts

Product code: 11748

£29.16RRP: £37.50(Save 22%)

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First ISIS with Bolts

Great value ISIS bottom bracket from First.

- Top quality sealed bearing ISIS bottom bracket from well-known component manufacturer First.
- Durable steel cups.
- The bearing races are integrated into the steel shell of the BB itself, allowing larger diameter balls and therefore increasing strength and durability.
- Water/dirt seals to both sides of the bearing keep out the elements!
- Tough yet lightweight M15 cromoly steel axle to keep weight down to a sensible level.
- Standard-tool cups on both sides, non drive side also includes an anti-creak composite sleeve.
- Supplied with a pair of steel M15 crank bolts.
- 68mm shell width with 128mm long axle.
- Weight: 350.9g (Incl. bolts)

Additional Information

- Please note, you may need to remove aluminium crank stoppers from bottom bracket axle to fit certain tools



Would this fit my 2006 zoo pitbull with middleburm peddle arms and miss the rear brake as a 118 Isis hits regards Matt

Posted by Matt on 08/03/2014

Reply from TartyBikes on 10/03/2014

Hi Matt - yes, this would fit that setup just fine unless you have extremely thick brake pads. Thanks, Flipp.


Hi will this fit an old school Megamo Pro 20?

Posted by Andy on 16/03/2014

Reply from TartyBikes on 17/03/2014

Hi Andy - thanks for your question. Yes, that should fit just fine! Thanks, Flipp.


I have a Trialtech Sport Forged crank with a Tensile Tor freewheel mounted on it (and a Onza Comp bashring if that makes a difference), will the axle length of this BB be enough so that the freewheel doesn't touch the outer casing of the bottom bracket? Thanks!

Posted by Liam on 09/04/2014

Reply from TartyBikes on 10/04/2014

Hi Liam - yes, this will offer you plenty of clearance - 128mm is the longest bottom bracket you can get for a trials bike! Thanks, Flipp.


hi, will this bottom bracket fit my onza rip 2010, thanks

Posted by liam on 22/05/2014

Reply from TartyBikes on 27/05/2014

Hi Liam - thanks for your question. This will fit your bike just fine. Thanks, Flipp.

Joe Urquhart

Hi, would this fit the onza comp? Thanks

Posted by Joe Urquhart on 10/07/2014

Reply from TartyBikes on 10/07/2014

Hi Joe - yes, this would fit a Comp perfectly. Thanks, Flipp.


Hello, would this bottom bracket fit my Felt Q800 (2008)? It has installed Truvativ blaze ISIS Drive cranks, frame size 21.5. Thank you!

Posted by Roman on 07/07/2016

Reply from TartyBikes on 08/07/2016

Hi Roman - Truvativ use a proprietary spline system that is very similar to the ISIS standard, but a little different. You would need the Truvativ Howitzer style BB for those cranks. Thanks, Mark


hello. i wonder if this fits in my inspired flow 20"

Posted by emil on 25/05/2017

Reply from TartyBikes on 26/05/2017

Hi Emil - If you have the original blue Flow 20" bike this BB should fit fine. If it's the more recent black Flow 20" bike, then a square taper BB such as the First square taper would do the job nicely. Thanks, Mark

david alexander

would this fit a onza rip 2009 and if so what crankset would i need to get as well

Posted by david alexander on 29/01/2014

Reply from TartyBikes on 30/01/2014

Hi David - thanks for your question. This bottom bracket would fit your frame just fine, and any ISIS cranks that we stock would fit just fine. The Trialtech Sport cranks are incredibly good value for money - there are lighter options, but in terms of strength and price they are about the best we currently stock. We would advise going for a 160mm or 165mm length. 170mm and 175mm lengths usually feel a little long on a 20" bike. Hope that helps. Thanks, Flipp.


Write a review


Based on 1 customer rating


Good item. precise and works well.

Posted by Keely on 01/03/2016

Good item. precise and works well. I'm glad i took it to a bike shop to get it installed in my bike because I wouldn't have known that I have to reuse a spacer that came off my old one due to the unusual spacing of my bike.

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  • © TartyBikes Ltd, 2018
  • Tel. (UK). 01772 32 33 33
  • Tel. (Intl). 0044 1772 32 33 33

TartyBikes Ltd, Units 3-4, Club Street, Bamber Bridge, Preston, PR5 6FN

  • Company No. 6131482
  • VAT. GB 860 0270 59

All prices listed are inclusive of sales tax at the correct rate for your country

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