I was wondering if a Repco Defy (20") BMX Bike would be good for 12 year old who's 150cm? I really would like to get one and just wondering whether it wouldn't break and if the welding and bolts are high quality. It would be jumped a fair bit but only max 1m of air and would have new alloy pedals and I would take off the reflectors and chain guard cos they're a bit stupid looking. I would really like to know ASAP so you can check it out at http://www.repcosport.com.au/ and go to products, boys bikes, defy.