fit racing bike tips - Discover the right fit of a GIANT DEFY for a cyclist with a height of 179 cm.


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Bike model


Crotch height

Arms length

Racing or amateur position

Current bike and size

Any problems with the current bike and size


Hi Luca,

I would gladly receive indications of the right size of the new bike I would like to buy.

Bike model: GIANT DEFY

Height: 179 CM

Crotch height: 83

Arms length: -

Racing or amateur position: -

The correct size of the GIANT DEFY ADVANCED road bike is ML.

However, preferring an amateur riding position and having lumbar pain, I wouldn't rule out the size M, which with a shorter horizontal tube allows you to have a higher and more comfortable position in the saddle.

Among other things, in this way, it would also have a greater difference in height between the saddle and the handlebars, which would not be possible with the size ML.

Ultimately if the theory says size ML, the practice for your specific case recommends a more appropriate size M.

In both cases, I advise you to maintain a slightly inclined bust position, which will come naturally to you with size M, while in ML you will have to adopt a shorter stem and a greater number of shims under the stem.

Excellent bike, comfortable and perfectly suited to his needs.