Pro's bikes get final tweaks before Challenge Mallorca (gallery)

Many professional cycling teams will use the Challenge Mallorca (January 29-February 1) as a pre-season warm-up, fitting in the racing around training camps.

Part of that process is assembling the rider's new bikes for the 2015 season, and an army of mechanics work all day and often all night to get bikes ready and tweaked as the riders' like them.

Cycling Weekly photographer Andy Jones perused the pits to bring you this gallery.

A Lotto-Soudal mechanic works to get André Greipel's Ridley bike built up

Checking the Campagnolo gears

No electronic gears for Greipel on this bike - he uses a mechanical set-up

Special frame graphics for 'Gorilla' Greipel

View of the cockpit of Greipel's bike before the bar tape is added

The all-important weigh-in gets an audience: André Greipel's bike tipped the scales at 7.25kg. Note the bar tape in the bottle cage

Movistar mechanic at work cleaning a chain on one of the team's Canyon bikes

New Bontrager Speed Stop brakes on the Polish ActiveJet team's Trek bikes.

MTN-Qhubeka mechanic assembles some cabling

Gluing on the tubs and pumping up in the MTN-Qhubeka van

Applying tub glue to rims

Steep stem position gives ultra-low riding position on Andreas Stauff's Cervelo S5 bike

No shortage of tools, as you'd expect

A quick road test to make sure everything is working