Suggestions for weight reduction for MTB hardtail

Discuss light weight issues concerning mountain bikes & parts.

Moderator: Moderator Team

Post Reply
apctjb
Posts: 60
Joined: Mon Oct 30, 2017 11:27 pm

by apctjb

Just finished my first attempt at a lighter weight MTB.

Came in under budget but over weight. (~10kg). Frame is light enough (~1200g) but front shock (120mm Reba) , dropper (125mm KSlev), large cassette (11-42), larger tires, wheels (2.6" on 40mm rims) all add up. I could have shaved 400g going with SRAM XX eagle instead of XT groupset but I like XT and the price was less than half of SRAM. 27.5 wheels are about 1600g with 40mm wide rims for running larger tires.

On my next build I would like to get under 9KG, but how? What would you suggest?
Attachments
20180214_090127.jpg

by Weenie


Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓    Broad Selection ✓    Worldwide Delivery ✓

www.starbike.com



User avatar
silvalis
Posts: 765
Joined: Mon Sep 07, 2015 1:02 am
Location: Aus

by silvalis

narrower rims and narrower/lighter tyres (or have you already gone for 2.6 instead of 2.8?). Then a shorter 100mm dropper. Then less fork travel (the reba 120mm is what? 1.57kg? - pretty light).

I can't tell which bontrager tyre you are running, but a 2.6WT Rekon 3C maxx terra is 730g.

I'm of the opinion that 40mm inner width is too wide for a 2.6" tyre, but it probably depends on the model of tyre/profile. 40mm rims are for 2.8-3" plus tyres.
Chasse patate

apctjb
Posts: 60
Joined: Mon Oct 30, 2017 11:27 pm

by apctjb

Thanks for the suggestions.

I got the 40mm rim in case I wanted to run 2.8", the frame can take up to 3". For the next build going to limit it to 2.6 so thinking 35mm rims and non-boost wheels.

The Reba came in around 1600g with axle. Not sure how much lighter a Reba with 100mm will be however, I thought they used pretty much the same parts.

User avatar
silvalis
Posts: 765
Joined: Mon Sep 07, 2015 1:02 am
Location: Aus

by silvalis

Yeah I was thinking that a 100mm reba wouldn't be any lighter afterwards. They normally just limit travel internally don't they?

I might have come to the same conclusion with you around tyres. 2.8 not worth it.
Chasse patate

rainerhq
Posts: 898
Joined: Wed Dec 15, 2010 10:32 am
Location: Estonia

by rainerhq

apctjb wrote:
Thu Feb 15, 2018 1:50 am
Frame is light enough (~1200g)On my next build I would like to get under 9KG, but how? What would you suggest?
:D
"Nothing compares to the simple pleasure of a bike ride"

marcocolo99
Posts: 5
Joined: Sun Feb 18, 2018 3:50 pm

by marcocolo99

I think you could easily find lighter, reliable bars, stem and grips that don't break the bank. Extralite grips, Wren stem, Easton EC90 bar maybe?

by Weenie


Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓    Broad Selection ✓    Worldwide Delivery ✓

www.starbike.com



Post Reply