My 4 year old son is racing BMX on an 18 inch micro mini against 20 inch bikes. ?

sudadon

How much of a dis advantage is this? Should I step up to a 20 inch if he is ready?

Answer
The bigger wheels are a distinct advantage. So yes when he's ready for the larger bike go for it. One other thing, while weight is always an issue in performace, bike and wheel weight is critical for speed with small riders. The bike weight is a larger % of total weight for a youngster. A couple pounds means little to a 180lb man compared to a 40-50lb kid. Get him on the lightest bike you can afford.

is a 26 inch bike good for me?

Simrah A

im 13 and 5 "5 inches i want a cruiser or a mountain bike thats 26 inch is it good for me??

Answer
PLEASE get the tire size out of your mind. That's how discount stores measure bikes. Real bicycles from real bike shops are measured by "frame size". You could have been on a bike with 26" wheels a long time ago - at about 5' tall even.

Look at the two links below. Both bikes have 26" tires. 1st bike has a small 13" frame size my kid started on when he was about 5' tall. 2nd bike has an 18" frame size - for when he grew (quickly) to about 5'7" tall.

At 5'5" tall, you would need about a 15" or 16" frame size. 3rd link.

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