How much does it cost to assemble a new bike bought online?

The cost of final assembly

A bike ordered online arrives "85% assembled": front wheel, handlebars, pedals, saddle and adjustments remain to be done. At the shop:

Some shops refuse or overcharge for assembling a bike not bought from them. Ask beforehand.

What is truly critical

Three points tolerate no approximation, because they are safety-critical:

• The handlebars and stem: tightened to the exact torque (often 5 to 6 N·m on carbon), otherwise cracking or slipping.
• The brakes: lever travel, pad contact, and bleed if transport has introduced air.
• Wheel fixation: quick-release properly closed or through-axle to torque spec.

Everything else (saddle, pedals, derailleur) can be finished calmly at home.

What you can finish yourself

Pedals, saddle height, fine derailleur adjustment: no risk with basic method. For gear adjustment, see adjusting your gears. The only real requirement for carbon is a torque wrench.

AI gives you the torque values for your model

The trap of home assembly is tightening. Too much and you crack the carbon; too little and it shifts. Ask L'Atelier's mechanic AI for the exact torque values for your stem, seatpost and brakes according to your brand. It also lists assembly order and safety points not to miss.

You can finish a simple assembly yourself this way, and pay the shop only if a brake bleed becomes necessary. To compare purchase channels, see buying in shop or online.