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Bike Size Guide - Wiggle Customer Service

Welcome to Wiggle's bike size guide

It’s important to get the right size bike, if the fit is good the bike will be more comfortable, faster and easier to handle. This Wiggle guide makes it easy to pick the right size bike and explains how to use the specific size charts on each bike model. If you are an experienced rider who knows the bike size and geometry that you prefer, the geo charts on individual bike pages should help you with your selection.

If you are still not sure, no problem, just book an appointment to talk to one of our experts, who will call you back to discus size and anything else you may like to know. Our qualified team of mechanics then individually check each order against measurements supplied by you to ensure the size chosen is correct. Another reason you can have complete confidence when buying a bike from Wiggle!

 

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How do I choose the right size bike?

Bikes are generally measured and defined by the length of the seat tube – the part of the bike that the seat post (and saddle) slide into. Traditionally this measurement is given in metric (cm) for road bikes, and imperial (inches) for mountain bikes, however some bikes are also sized as small, medium, large etc.

This is not always the most accurate guide though, so it is important to see what height the individual bike chart relates to and to also consider your own measurements and proportions.

 

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What measurements do you need?

There are three measurements that will assist you in choosing the right size bike; your height, your inside leg measurement, and your reach;

Standover height

Your inside leg measurement will determine your stand over height – this is the clearance between the top tube of the bike and your crotch when stood just in front of the saddle. We suggest a clearance of at least 2” to enable you to hop off quickly if you need to.

 

Reach

If your height and inside legs measurements put you in between sizes, your upper body should be the deciding factor as your reach to the bars will be affected by either size. To work out if you have a long or short reach, you need to determine your ‘ape index’ – this is your arm span minus your height. If you have a positive ape index (ie your arm span is greater than your height) then we suggest you go for the larger of the sizes. If you have a negative ape index (ie your height is greater than your arm span) then you will probably be more comfortable on the smaller of the sizes.

For example; 152cm (arm span) – 163cm (height) = -11, so a negative ‘ape index’ and should go for a smaller frame if in-between sizes.

 

 

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Do I need a women's specific bike or a unisex bike?

Tough question! On average women have longer legs and shorter torso’s than men of the same height, so female specific bikes have a shorter top tube to stop riders feeling stretched. They also usually come with narrower handlebars and female specific saddles.

However, people are not “averages” and a bike should be the perfect fit for you individually, whether it is a unisex bike or a women’s specific fit.

As a general rule, if you are shorter than about 5ft 5 (165 cm) or have felt too stretched on mens / unisex bikes previously, then you may be more suited to a female specific bike which offers smaller frame sizes. The majority of women will have the choice of all bikes though, in which case refer to our generic size charts below and the individual bike pages. 

 

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How do you choose the correct size kids bike?

Children’s bikes are defined by age as opposed to height, and options are given as wheel (as opposed to frame) sizes. As children are still learning to ride, it’s especially important that their bike is the right size. There can be a temptation to stretch the life of a bike by buying a slightly bigger one, but this should be avoided as whilst a child is learning they must be able to straddle the top tube safely.

Our table below suggest which wheel sizes are most suitable for which age range, however you know your child best. If he / she is the tallest in the class and on the upper limit for a wheel size, we suggest getting the next wheel size up. If he / she is in the middle of the range, we suggest you stick to that size.

 

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Bike Sizing Charts

MTB - Off Road (Hardtail) MTB - Off Road (Full Suspension)
Height Inside Leg Frame Size Height Inside Leg Frame Size
4'10" - 5'0" 26" - 28" 13" 5'4" - 5'7" 28" - 30" 14", 15"
5'0" - 5'3" 27" - 29" 14", 15" 5'8" - 5'9" 29" - 31" 16", 17", 18"
5'4" - 5'7" 28" - 30" 16", 17" 5'10" + 30" - 32" 19", 20", 21"
5'8" - 5'9" 29" - 31" 18", 19" .
5'10" - 5'11" 30" - 32" 20"
6'0" - 6'2" 32" - 34" 21"
6'2" - 6'4" 33" - 35" 22"

 

Hybrid - Leisure/Comfort Hybrid - Sport/Commuter
Height Inside Leg Frame Size Height Inside Leg Frame Size
4'10" + 26" - 28" 13", 14" 4'10" + 26" - 28" 13", 14"
5'0" + 27" - 29" 15" 5'0" + 27" - 29" 15"
5'2" + 27" - 29" 16" 5'2" + 27" - 29" 16"
5'4" + 28" - 30" 17" 5'4" + 28" - 30" 17"
5'6" + 28" - 30" 18" 5'6" + 28" - 30" 18"
5'8" + 29" - 31" 19 5'8" + 29" - 31" 19
5'10" + 30" - 32" 21" 5'10" + 30" - 32" 21"
6'0" + 32" - 34" 22" 6'0" + 32" - 34" 22"

 

Road - Standard
Height Inside Leg Frame Size
5'1" - 5'3" 27" - 29" 48cm
5'3" - 5'5" 28" - 30" 50cm
5'5" - 5'7" 29" - 31" 52cm
5'7" - 5'9" 30" - 32" 54cm
5'9" - 5'11" 31" - 33" 56cm
5'11 - 6'2" 32" - 34" 58cm
6'1" - 6'3" 33" - 35" 60cm
6'3" - 6'5" 34" - 36" 62cm

 

Road - Compact Road - Compact - Ladies
Height Inside Leg Compact Frame Size Height Inside Leg Compact Frame Size
5'2" - 5'4" 27" - 29" XS 5'0" - 5'2" 26" - 28" 2XS
5'4" - 5'7" 29" - 31" S 5'2" - 5'4" 27" - 29" XS
5'7" - 5'10" 31" - 32" M 5'4" - 5'6" 28" - 30" S
5'10" - 6'0" 32" - 33" M/L 5'6" - 5'8" 29" - 31" M
6'0" - 6'3" 33" - 34" L 5'7" - 5'10" 30" - 32" L
6'3" - 6'6" 34" - 36" XL .

 

 

Kids

Age

Inside Leg Wheel Size
2-4 yrs 30cm 12" or Beginner Bikes
2-5 yrs 30cm 12"
3-5 yrs 36cm 16"
5-7 yrs 41cm 16"
7-9 yrs

51cm

20"
9-11 yrs 61cm 24"

11 and up

66cm 26"

 

We hope you have found this guidance useful and if you have any further queries regarding sizing please contact us.

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