fit racing bike tips - Discover the right fit of a Specialized Tarmac SL8 for a cyclist with a height of 172 cm.


If, on the other hand, you want advice on the right frame size for you (bdc or mtb), send all your data and the model you would like to buy to: This email address is being protected from spambots. You need JavaScript enabled to view it.


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: Specialized Tarmac SL8

Height: 172 CM

Crotch height: 85 CM

Arms length: -

Racing or amateur position: --


The correct size of the Specialized Tarmac SL8 road bike is 54, although 52 could also be considered.

Since he now rides on a size 54 racing bike, with geometries similar to the size 54 Tarmac, he might as well stay on the 54 and adapt the new bike to the old sizes in use.

The best, easiest and safest thing to do is always replicate the measurements of the old bike on the new one.

All the Pros do it, I don't understand how it is so difficult to do for a simple racing bike enthusiast.

Great racing bike!


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