Hey everyone. I have a 7 year old who's been racing about 6 months. He's placed 1st a few times and 2nd a few times at our home town track. He has a redline proline Jr. Bike. Im still learning so would anyone be able to give me advice on how to upgrade his bike? He pedals harder than everyone and they're flying by with hardly any pedaling. I know it has something to do with the teeth ratio? Help please! Thank you
First Year 7 Yearold!
- Thread starter baylee23
- Start date
without knowing how the bike is currently set up, I'd say increase the size of the front chain ring.
Hi @baylee23 - I noticed you posted in the Support forum, which is really only for website related issues. I have moved your post to the Lounge where others may see it.
I agree with the two posts above, though, increasing the size of the front chain ring will give him a larger ratio and will move the rear wheel more with fewer pedal strokes. It'll also make it harder to pedal up hills, though, so don't go too crazy. Redline's website says that "stock" is a 38 tooth front chainring, maybe a 40 tooth would be the ticket? Or maybe another monkey can correct me - I was never much of a single speed rider.
I agree with the two posts above, though, increasing the size of the front chain ring will give him a larger ratio and will move the rear wheel more with fewer pedal strokes. It'll also make it harder to pedal up hills, though, so don't go too crazy. Redline's website says that "stock" is a 38 tooth front chainring, maybe a 40 tooth would be the ticket? Or maybe another monkey can correct me - I was never much of a single speed rider.
I believe a proline jr. runs a 38/14 gearing which given wheel and tire size puts him at 56.44 gear inches. This is higher than the 'traditional' 44/16 BMX gearing. I would actually gear down, maybe by running a 37 up front. He needs to spin the cranks more.
gear calculator:
http://bmxultra.com/gear-calculator/
gear calculator:
http://bmxultra.com/gear-calculator/