Brother is looking to purchase a new 650cc fork,

http://www.cyclesmercier.com/geometry_tt.html

that is he is geo spec sheet, He has a 47.

The stock fork
Kilo TT: 1'' Threadless Fork

Description: Fork Specifications

Steerer Tube: 1'' Threadless
Steerer Tube Length: 330 mm
Fork Rake: 44 mm
Axle to Crown Length: 345 mm
Crown Race: 26.4 mm

Front Axle Type: 9x1
Wheel Size: 700c
Front Hub Spacing: 100 mm
Brake Type: Road Caliper - Standard Reach
Brake Usage F/R: Front
Steer Tube Material: Steel


My brother has a frame builder and fork builder, willing to build his fork.

Using a rake caculator i've came to conclusion that 41.10 mm rake will be the same trail

I'll use the same dimensions on everything else correct?

What would the axle to crown be?