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Trialtech Sport Lite ISIS with Bolts

Product code: 11365


On order

Trialtech Sport Lite ISIS with Bolts

- Fully custom designed and manufactured bottom bracket from Trialtech.
- Designed and tested over a period of more than a year with the help of team riders Ali C and Stan Shaw, this has to be the best steel ISIS BB available for your trials bike.
- Super high quality manufacture with excellent tolerances and finishing quality.
- Fits both 68mm and 73mm shell widths, but designed primarily for 68mm shell frames. With a 68mm shell the left hand cup will sit proud of the BB shell on your frame around 2.5mm, or disappear inside the frame 2.5mm with a 73mm shell frame.
- Lightweight M15 axle is made from extremely high grade cromoly steel to ensure it is still very strong.
- Anodised aluminium alloy cups keep the weight down.
- Axle stoppers are a unique 'top hat' design, preventing them from being damaged by your cranks in the case that your splines are a little worn, plus they can be removed easily to ensure that all types of 20-tooth Shimano BB tool can be used with this BB.
- Unique two bearing design (one each side) saves weight but is still durable enough for trials. Each bearing unit has a unique design allowing almost twice the number of balls as normal, thus twice the load capacity. In testing, these single row bearings out-lasted double bearing units seen on other similar bottom brackets while being lighter!
- Clears all models of freewheels and all setups using a bashring.
- Includes steel 8mm allen key crank bolts (may be black or silver).
- Available in 128mm axle length only.
- Supplied in custom printed Trialtech box with Trialtech stickers enclosed.
- Weight: Only 214g plus supplied bolts (253g including bolts).

Additional Information

Please note that the crank stoppers must be fitted with the thick end facing the crank, as shown in the photos.



Hello, would the echo crank bolts or the echo BB spacer fit this BB. Thanks

Posted by derek on 02/11/2011

Reply from TartyBikes on 03/11/2011

Hi Derek - The Echo SL crank bolts will fit the Sport Lite BB fine (in fact I'm currently using that setup now!), although the Echo BB spacers will only fit the Echo BB. Thanks, Mark


Hi does Trialtech Sport Lite ISIS with Bolts fit the onza zoot frame?

Posted by Milkessa on 14/04/2012

Reply from TartyBikes on 16/04/2012

Hello - This BB should fit in your Zoot fine. Thanks, Mark


will this fit a because colour 20" 2012 with a flawless bikes bashring and echo sl freewheels

Posted by george on 29/10/2013

Reply from TartyBikes on 29/10/2013

Hi George - yes, that should fit fine. Thanks, Flipp.


hi will this fit a inspired fourplay frame?

Posted by archie on 20/12/2013

Reply from TartyBikes on 23/12/2013

Hi Archie - yes, that would fit just fine (providing you are using ISIS cranks, of course!). Thanks, Flipp.


Hey guys. I have been using this BB on my Monty XXV 26" and I absolutely love it! However it has started making creaking sounds when I pedal, is it possible to do a DIY service?

Posted by Hannes on 14/05/2014

Reply from TartyBikes on 14/05/2014

Hi Hannes - thanks for your question. A creaky bottom bracket usually just means something isn't quite tight. If you take the cranks off and bottom bracket out, grease all the threads and splines up and put it all back together making sure everything is nice and tight, that should eliminate it. It's usually worth doing the pedal threads at the same time, just in case it's those making the noise. If you do that and it is still creaking please get in touch and we'll do our best to help! Thanks, Flipp.


Will this BB fit an Echo Control frame?

Posted by Nomad on 30/01/2015

Reply from TartyBikes on 02/02/2015

Hi Nomad - thanks for your question. Yes, this will fit that frame just fine. Thanks, Flipp.


Just wanted to know i have the ozonyz curve v5 frame wanted to know if these Trialtech Sport Lite Splined ISIS, with Bashring and Freewheel would fit and if so would this bb fit the frame please. Thanks :).

Posted by Dean on 07/08/2017

Reply from TartyBikes on 08/08/2017

Hi Dean - That setup should work fine as far as we're aware! We haven't used that specific setup ourselves but the cranks have reasonable offset and the BB is 128mm wide so you should be fine with that. Thanks, Mark


Could you use this bb with the echo splined cranks enabling you to run the lighter cranks and freewheel setup on a standerd bb shell

Posted by Daniel WADDON on 02/04/2018

Reply from TartyBikes on 02/04/2018

Hi Daniel - Due to the unique spacer/preload arrangement on the Echo Splined Crankset, you wouldn't be able to use them with this BB sorry. They are only compatible with Echo or Trialtech Spanish-style BBs. Thanks, Mark


Do they make a Ti version?

Posted by Ric on 29/06/2018

Reply from TartyBikes on 29/06/2018

Hi Ric - Trialtech used to make a Ti BB (called the Trialtech SL Ti ISIS BB), but they stopped making them a year or two ago unfortunately. As more manufacturers shift to new BB standards it seems Ti ISIS BBs are getting harder and harder to source. Sorry we can't be more help! Thanks, Mark

chris tabb

hi Guys. Would this fit in to the Koxx Sky 2 Frame ?

Posted by chris tabb on 10/12/2011

Reply from TartyBikes on 12/12/2011

Hi Chris - This should fit in a Sky 2 frame fine. Thanks, Mark

Marcell Schmalhorst

Hello, would this BB fit the onza bird 2012 with the 160mm Try-All Expert ISIS and an 22t Trialtech Sport screw on? big thanks, Marcell

Posted by Marcell Schmalhorst on 20/09/2013

Reply from TartyBikes on 23/09/2013

Hi Marcell - yes, all that would fit together absolutely fine. Thanks, Flipp.

robi lukanc

Hello guys, I want to know,does this BB fits in my Koxx yellow entry line?Thanks

Posted by robi lukanc on 09/11/2014

Reply from TartyBikes on 10/11/2014

Hi Robi - thanks for your question. This should fit your frame just fine, though the bike comes with square tapered cranks. These will not fit onto an ISIS bottom bracket, so unless you have changed the cranks you will require a square taper bottom bracket. Hope that helps. Thanks, Flipp.

Aleksandar Oynakov

Will this fit fine to zoo! pitbull 2008 ?

Posted by Aleksandar Oynakov on 07/07/2018

Reply from TartyBikes on 09/07/2018

Hi Aleksandar - This should fit the ZOO! Pitbull fine. Thanks, Mark


Write a review


Based on 3 customer ratings


Excellent BB

Posted by Christian on 29/11/2010

This is by far the best ISIS 128 BB ever made. Very light weight yet very strong and just generally good features. The crank stop washer design is really excellent.


Nice bb

Posted by Paul on 06/04/2012

Lovely bottom bracket, very smooth and good weight.

Reply from TartyBikes on 10/04/2012

Hi Paul - The Sport Lite BBs are really good - I use one myself and it's been spot-on the whole time I've used it. Thanks for the review!



Posted by Ash-Kennard on 04/09/2012

Really nice bottom bracket. Owned and ridden for 2 years straight. Bearings, axle, threads and splines are all still excellent.

Reply from TartyBikes on 05/09/2012

Hi Ash - It's good to hear this BB has lasted you so long! Thanks for leaving a review.

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  • Tel. (UK). 01772 32 33 33
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