Gusset Trident ISIS BB

Now £36.18
Save 10% RRP: £39.99
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Product Description

Hardcore use ISIS BB that won't let you down, or rip your frame threads to pieces!

Triple Bearing;
The large diameter ISIS axles mean that there is limited space for the bearings to fit into the BB area, and so, relatively small bearings have to be used. This Trident unit uses 3 bearings (2 on the drive side) to reduce the load on each bearing and hence lengthen the bearing life.

Dip Centre;
Many frames have either tube ends, or a non machined centre to the BB shell. This can present a problem for some BB units that do not dip in the middle area… as the BB can risk fouling the inner BB shell during installation, which can result in misalignment, and consequent cross threading of the frame BB threads.
The Trident unit does have the required centre clearance for use with most frames without this problem*. (*However, extreme care should still be utilized when installing cartridge BBs to completely avoid this common problem.)

Cr-Mo TAF cups;
ISIS BB cups have to be produced in a relatively thin wall thickness to allow maximum space for bearings. Lightweight, thin alloy cups run the risk of cracking under hard use due to their lack of base material strength. Further, Aluminium is a relatively soft material, and therefore cups produced in Aluminium can be prone to the delicate threads breaking up on installation and extraction during servicing especially if the frame threads are not 100% clean. This can result in major frame thread problems, as the broken alloy shards can bind further and can eventually cause the frame BB threads to become ripped out also.

We specify Forged Cr-Mo cups which are far stronger than their Alumimium equivalents and yet have a similar weight. These TAF Cr-Mo cups with CNC machined threads are far less likely to crack from hard use, or allow their threads to break up during installation and extraction.

Trident ISIS BB
Triple bearing ISIS BB with reliable TAF forged Cr-Mo cups.

Occasionally, without notice, manufacturers change product design and/or specifications.

Bottom Brackets Guide

What is a bottom bracket?

A bottom bracket is the bearings that the crank axle passes through, keeping the cranks turning smoothly.

Who needs a bottom bracket?

Every bike has a bottom bracket, so if your bike is creaking or feels stiff or notchy as you turn the pedals, your bottom bracket might be worn out and need replacing.

What are the choices?

It’s not so much a choice as a matter of compatibility. You need to establish whether your bottom bracket is press-fit or threaded and what size. Then you need to make sure it is compatible with your crankset. If it’s worn out, replacing like for like is often the easiest thing to do.

What should I buy with it?

You need some specialist tools both to fit and remove bottom brackets and to remove the cranks to get at it.

Anything else?

If you’re fitting a bottom bracket into a brand new frame, your frame will need some preparation first. Bottom bracket shell facing tools can be very costly, so you might need to bring it into a bike workshop to get this done.

Delivery & Guarantee

UK Delivery Information

International Deliveries – Temporarily Suspended 11/11/20

Note: We are still offering deliveries to the Isle of Man, Scottish Highlands, Scottish Islands, Channel Islands, Isle of Wight, Jersey and Guernsey. We are no longer delivering to Northern Ireland.

Courier Delivery update: Due to the COVID19 situation, we are currently experiencing some delays with deliveries. Our couriers are working around the clock to get your order to you as soon as possible but there is a potential delay of up to 48 hours . Please check your tracking on track your order here.

Please download the TNT Track and Trace App for iOS here and Android here so you can keep an eye on your delivery and any further updates.

Please note on the TNT tracking app it may show your delivery status as ‘Collecting’ (as per image below). This means your delivery has left our warehouse and is currently held at TNT main depot and there could be up to a 48 hour delay.

tnt delivery

Please keep checking the TNT tracking for further updates. On behalf of TNT we apologise for any delay and inconvenience this may cause. 

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.