Giant Bike Size Guide

The following Guide is sourced from: http://www.cyclestore.co.uk/contentPages.asp?pageID=61

Giant Bike Size Guide

Sizing Guide for Giant Bikes.

General Guidance.

It is possible to ascertain a close approximation of the correct bike size required using the simple calculation below. However, please be aware of height, for example someone who is 6ft with a 30” inside leg versus someone who is 5ft with a 30” inside leg may need a larger frame because their body would be longer. The bigger the frame size, the longer the top tube.

The calculation that can be used to estimate your required frame size are below:

(N.B. All these measurements are a guide and Giant recommends that to get a proper idea of correct size it is best to physically sit on a bike at a local Giant dealer).

Take the inside leg measurement to the floor. Subtract 3” for mountain bikes, or 1” for road bikes, then subtract 10” which is the average distance from the bottom bracket to the ground. This will then give the approximate frame size that will be needed.

Contained in the following tables are further guides for sizing on different Giant models:

TCR Sizing 

Size	Measurement	Approx height range	Top tube length
XS	42cm	4ft 11 – 5ft 2	515mm
Small	46.5cm	5ft 2 – 5ft 6	535mm
Medium	50cm	5ft 6 – 5ft 9	555mm
Medium/ Large	53.5cm	5ft 9 – 6ft	570mm
Large	55.5cm	6ft  – 6ft 3	585mm
XL	58.5cm	6ft 3 – 6ft 7	610mm

 OCR Sizing

ize	Measurement	Approx height range	Top tube length
XS	48cm	4ft 11 – 5ft 2	515mm
Small	51cm	5ft 2 – 5ft 6	535mm
Medium	54cm	5ft 6 – 5ft 11	555mm
Large	57cm	5ft 11 – 6ft 3	575mm
XL	60cm	6ft 3 – 6ft 7	595mm

SCR Sizing

Size	Measurement	Approx height range	Top tube length
XS	43cm	4ft 11 – 5ft 2	510mm
Small	46.5cm	5ft 2 – 5ft 6	530mm
Medium	50cm	5ft 6 – 5ft 11	550mm
Large	55.5cm	5ft 11 – 6ft 3	575mm
XL	58.5cm	6ft 3 – 6ft 7	600mm

FCR Sizing

Size	Measurement	Approx height range	Top tube length
XS	42cm	4ft 11 – 5ft 2	520mm
Small	46.5cm	5ft 2 – 5ft 6	535mm
Medium	50cm	5ft 6 – 5ft 11	550mm
Large	55.5cm	5ft 11 – 6ft 3	575mm
XL	58.5cm	6ft 3 – 6ft 7	600mm

Mountain Bikes (Hardtail)

Size	Measurement	Approx height range
XS	14”	4ft 11 – 5ft 2
Small	17”	5ft 2 – 5ft 6
Medium	19”	5ft 6 – 5ft 11
Large	21”	5ft 11 – 6ft 3
XL	23”	6ft 3 plus

Mountain Bikes (Full Suspension)

Size	Measurement	Approx height range
Small	16.5”	5ft 3 – 5ft 6
Medium	18.5”	5ft 6 – 5ft 11
Large	20.5”	5ft 11 – 6ft 2
XL	22.5”	6ft 2 plus