[nhmtns]

Is it possible to switch from the stock 32T to a 28T chainring on my son's bike with this TRUVATIV crankset?

 

[blcman]

I haven't dealt with 104 BCD chainrings for a while but I believe a 30 T is as small as you can go due to the spider arms. Even then
the ring has to have threads on it to mount properly. Check out the Race Face NW ring for example.

 

[mr_chrome]

- check with absoluteBlack, I'm running a 28T Oval on my bike.........

 

[silentG]

North Shore Billet makes one - 1x 64/104 BCD Variable Tooth Chainrings

It looks like this one is for 64 and 104 BCD cranks.

 

[nhmtns]

Thanks for the suggestions.

 

[nhmtns]

- check with absoluteBlack, I'm running a 28T Oval on my bike.........

The 26T and 28T say 64BCD. Will those mount to the crankset ok?

absoluteBLACK | 1X OVAL 104 & 64 bcd Traction Chainring

Our OVAL traction 104BCD chainrings will help you climb easier, spin smoother and save your knees. Worlds best Oval chainring on the market!

absoluteblack.cc

 

[blcman]

The 26T and 28T say 64BCD. Will those mount to the crankset ok?

absoluteBLACK | 1X OVAL 104 & 64 bcd Traction Chainring

Our OVAL traction 104BCD chainrings will help you climb easier, spin smoother and save your knees. Worlds best Oval chainring on the market!

absoluteblack.cc

If your crankset has the ability to run 2 chainring then the 26T or 28T 64 BCD rings can be mounted on the inside spot otherwise if it's a single chainring setup then 30 T is the smallest you can go.
Your pictures look like a single chainring setup but hard to tell from the photos.

 

[J_Westy]

Normally the diameter is too small to have teeth and mounting holes, but usamadeco makes one with an integrated bash ring... down to 26T.

Their website seems to be dodgy, so might be best to look it up on facebrag.

Edit: I see on the facebrag page, that they moved to Amazon... was a bit hard to find, so here you go:

Amazon.com : USA Made 104mm BCD SharkTooth Pro Integrated Mountain Chainring and Guard fits 1/9/10/11-Speed drivetrains (28 Tooth) : Sports & Outdoors

Amazon.com : USA Made 104mm BCD SharkTooth Pro Integrated Mountain Chainring and Guard fits 1/9/10/11-Speed drivetrains (28 Tooth) : Sports & Outdoors

www.amazon.com