Weight Weenie Showdown: Shimano Di2 vs. SRAM Force 1

Especially for light weight issues concerning cyclocross / touring bikes & parts.

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Bhaalgorn
Posts: 25
Joined: Mon Jun 05, 2017 2:10 pm

by Bhaalgorn

I had been trying to sell a custom-built 2015 Niner RLT 9 with a top spec Di2 setup (details here for the curious). However, after a couple months of little action, I got a bite but the buyer wanted the Force 1 groupset on my 2016 Niner BSB 9 RDO. I didn't really want to keep the uber fancy Di2 stuff, but I also don't need two cyclocross bikes, so I obliged and set about swapping everything around. I weighed the components, and here I present the findings:

Derailleurs: (Winner: Force 1 by 29g)
Force 1 Rear Derailleur: 262g
XTR Di2 Rear Derailleur (long cage): 291g

Front Brake: (Winner: Force 1 by 118g)
Force 1 (includes Force 1 calipers+ Force 1 brifters+hose/oil+160mm front brake adapter): 334g
R/S785 (R785 brifters+RS785 calipers+hose/oil+160mm front brake adapter): 452g

Rear Brake: (Draw - negligible difference)
Force 1 (calipers+brifters+shifter cable+hose/oil): 457g
R/S785 (calipers+brifters+Di2 cable+hose/oil): 452g

Di2 Parts: (Well, duh!)
Di2 (includes Junction A, Junction B, Rear Derailleur Wire, Battery Wire, Down Tube Wire): 98g
Force 1: 0g

Conclusion:
Force 1 mini group is 240g (0.53 lbs) lighter than a comparable Shimano Di2 group.

Bonus Crankset Comparisons:
Dura-Ace 175mm crankarms: 512g
AbsoluteBLACK 38T oval: 63g
Wheels MFG PF30>24 BB: 155g

Force 1 175mm carbon crankarms: 464g
SRAM 42T X-sync: 75g
Quarq Power Meter spider: 154g (direct-mount chainrings save a lot of weight!)
WheelsMFG PF30 BB: 108g

The Force 1 groupset worked perfectly for me, so I somewhat regret letting it go, especially since the weight penalty is so much more than I expected.

Marin
Posts: 2819
Joined: Wed Jan 22, 2014 11:48 am
Location: Vienna Austria

by Marin

Thanks, interesting facts!

I have a Force 1 crankset, but with an 80g direct mount Garbaruk ring and running in an adapted 68g Shimano BB :)

Didn't know the arms were relatively light!

by Weenie


ooo
Posts: 537
Joined: Sat May 21, 2016 12:59 pm

by ooo

Shift cable and housing for Sram adds 50g
'

justaute
Posts: 227
Joined: Fri Jan 04, 2013 7:17 pm
Location: UT/TX/PA, USA

by justaute

Good info. I wonder what the delta would be between XTR/RS785 Di2 (1x11) and Force 1.

grover
Posts: 1127
Joined: Mon Jul 26, 2004 1:06 pm

by grover

ooo wrote:Shift cable and housing for Sram adds 50g


He included that in his 'rear brake' comparison. Well at least the inner cable. Not sure if the outer is included.

boots2000
Posts: 1441
Joined: Mon Oct 15, 2007 9:28 pm

by boots2000

Why not use XTR 9000 calipers? They are lighter-

Bhaalgorn
Posts: 25
Joined: Mon Jun 05, 2017 2:10 pm

by Bhaalgorn

ooo wrote:Shift cable and housing for Sram adds 50g

Shift cable and housings were included in the weights, as well as all the parts and cables required for Di2. It's a complete group comparison.

justaute wrote:Good info. I wonder what the delta would be between XTR/RS785 Di2 (1x11) and Force 1.

This was a comparison between XTR/RS785 in a 1x11 vs Force 1. Do you mean XTR vs. RS785?

boots2000 wrote:Why not use XTR 9000 calipers? They are lighter-

I was planning to go with the 9000s (or some other XTR model even), but I got a good deal on the RS785 calipers. The weight savings wasn't worth the cost to me, plus I kind of like having the matching calipers and brifters.

justaute
Posts: 227
Joined: Fri Jan 04, 2013 7:17 pm
Location: UT/TX/PA, USA

by justaute

Bhaalgorn wrote:
justaute wrote:Good info. I wonder what the delta would be between XTR/RS785 Di2 (1x11) and Force 1.

This was a comparison between XTR/RS785 in a 1x11 vs Force 1. Do you mean XTR vs. RS785?


My bad. For whatever reason, I thought you were running 2x11. Nice work.

ooo
Posts: 537
Joined: Sat May 21, 2016 12:59 pm

by ooo

which cassettes do you use, how you can compare shifting quality?
'

by Weenie


moyboy
Posts: 169
Joined: Thu Aug 18, 2016 12:19 am

by moyboy

I'm using an XG-1199 10-42 cassette, love it.

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