Cube reaction pro dropper post

[Slow as]

Hi all, have a 2021 reaction pro hardtail, size small. Wanting to install a dropper post. Has anyone on hear fitted one to a small frame ? The factory fitted unit measures 350mm, which may limit me to a 75mm dropper.

 

[MadTurnip]

Seat tube length is 405mm on the size small according to:

Cycle Superstore | Shop Road, MTB, City & Electric Bikes in Ireland - Cycle Superstore

www.cyclesuperstore.ie

27.2mm is the seat post diameter.

So you should be able to fit this 105mm dropper:

Brand-X Ascend II Dropper Seatpost | Chain Reaction

Brand-X Ascend II Dropper Seatpost - Lowest Prices and FREE shipping available from The World's largest online bike store - Chain Reaction Cycles

www.chainreactioncycles.com

You should measure how high your seat post is extended currently as you can take that off the clearance also.
Its worth noting the seat tube length includes some of the bottom bracket so it will help if your current seat post length is at least 120mm.

Some simple maths for if a dropper will fit.
Measure your post length some saddle mount to seat tube clamp and subtract that from your dropper length in this case 105mm.
Post length - 105 = X

minimum insertion length - X < seat tube length - bottom bracket radius.
390 - X < 405-20