My son has a Mongoose McCan and is well pleased with it. Except as he is only 10 he seems to have a lot of trouble getting up to speed quickly ?
I think the standard gearing is 38 Front and Odyssey 13t Rear Cassette Cog.
He has ridden his mates Haro Mirra 540 which i think has a 39 T Front ? He found this easier but could possibly go a bit more ?
What do you think would be the best combination and best way for me to sort this for him ?

His mate beats him in a drag race as hes flying out the blocks. just want a happy compromise really but need your advice guys ... please.