Question:We don't have a bike shop within driving distance from us and will be ordering a mountain bike online for our son for Christmas. We're just not exactly sure if we should order a 20" or a 24". Our son is 4'9" tall; and crotch to the floor is 25". All the sites seem to say 24"; but to me, he seems too short in the crotch for a 24"; but on the other hand, I don't want a bike that will only last him a year.
Any advice would be very much appreciated! Thanks in advance!
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He sounds tall for 11. Check www.halfords.com. They have a sizing guide online. I'd go for the bigger size.
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24" is good for his size
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2 FACTORS TO KEEP IN MIND,
2. EXPECTED GROWTH
KINDA CALCULATE HOW MUCH YOU EXPECT HIM TO GROW, AND MEASURE HIS INSEAM. IF YOU THINK HES GOING TO GROW ALOT GO FOR THE BIGGER ONE.
GOOD LUCK AND GOD BLESS
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The rule is that the seat, when it's all the way down, should be the same height as the person's crutch. In other words, when you straddle the bike with feet flat on the floor, the seat should barely touch the crotch. Ordering online or buying from a catalog is going to be hard since you can't run that simple test. Maybe the store you're buying from has a chart where you can pick the right size from. Good luck.
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A 24 will be too small within a year or so but at the moment a 26 will be a bit of a handfull for him. It's a funny age for bike fitting but would be worthwhile spending a wee bit extra on a lighter, smaller framed 26. Some bikes have a curved top tube on them now to give a little exra clearance while standing over them.
I work out bike sizes to be roughly half the wheel size+the frame size=inside leg measurement. So a 26 wheeled bike is 13+13 inch frame=26 inside leg. Remember that the feet DO NOT have to touch the floor when sitting on the saddle. If they do then it leads to the most uncomfortable riding position.
Best of luck!
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A 26 inch
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i would recommend a 20". if you know someone with a 24" have him try it and see how he likes it. just dont give him any hints that you plan to buy him a bike!
you might also consider getting a 24" with a small frame. frames come in Small, Medium, Large, and beyond, but look at the size in inches. for an 11 year old, try a 14" frame. this measures the length of the seat tube from the middle of the bottom bracket (pedals connect to the cranks, and the cranks connect to the bottom bracket) up to the top of the tube were the seat goes into. go small to start with- you can always raise the seat.
check out the selection at target. you can get a bike for less than $150 for him and dont have to pay shipping. i wouldnt recommend ordering an entire bike online, unless you really know what your doing.
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