2021 Trek Emonda SL/SLR

Discuss light weight issues concerning road bikes & parts.
alcatraz
Posts: 2258
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

Is there any way to design a T47 shell lightweight? Can it be made from carbon? Does it need to be connected left/right side?

by Weenie


Stitchking
Posts: 176
Joined: Fri May 25, 2018 7:30 am

by Stitchking

Logo is a little small for a trek?
the designer was a little time crunched at work today sorry

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Stendhal
Posts: 213
Joined: Sun Sep 25, 2016 1:43 am
Location: Silicon Valley

by Stendhal

Stitchking wrote:
Mon Sep 23, 2019 12:21 am
here is a leaked artists rendering
s-works-tarmac-sl6-disc-dura-ace-di2_13178.jpg
:lol: made my day :welcome:
Specialized S-Works Tarmac SL6 (6.39 kg), Cervelo Aspero (7.87)
Retired: LOW// mki, Pinarello Dogma F10 \ F8, Lapierre Pulsium, TIME Fluidity, Wilier Cento1 SR, Ridley Noah, Cyfac Cadence, Cervelo S2, R3, R5, Felt Z25, Klein Quantum, Cannondale 2.0

jimmerjohn123
Posts: 24
Joined: Sat Jun 24, 2017 4:19 pm

by jimmerjohn123

alcatraz wrote:
Mon Sep 23, 2019 3:11 am
Is there any way to design a T47 shell lightweight? Can it be made from carbon? Does it need to be connected left/right side?
What is the general weight penalty in the first place? Are we talking 100-200 grams?

TobinHatesYou
Posts: 4301
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

jimmerjohn123 wrote:
Mon Sep 23, 2019 6:47 pm

What is the general weight penalty in the first place? Are we talking 100-200 grams?

At least some of the weight penalty is balanced out by the use of a DUB or 30mm spindled crank instead of the 24mm steel spindled cranks we’re currently forced to use with BB90.

Morkai
Posts: 13
Joined: Thu Mar 01, 2018 2:00 am

by Morkai

TobinHatesYou wrote:
Mon Sep 23, 2019 7:44 pm
At least some of the weight penalty is balanced out by the use of a DUB or 30mm spindled crank instead of the 24mm steel spindled cranks we’re currently forced to use with BB90.
RED 11s 50/34 GXP 568g
Quarq 11s 50/34 GXP 737g (Powermeter 169g)
BB90 GXP BB 50g

AXS 12s 46/33 DUB 566g
Quarq 12s 46/33 DUB 595g (Powermeter 29g)
T47 DUB BB 106g
T47 frame penalty ???g

If we assume that the weight penalty by going from BB90 to T47 is 75g, then the non-PM BB90 system weights 568+50=618g and T47 566+106+75=747g (129g more) and PM BB90 737+50=787g vs T47 595+106+75=776g (11g less).

AXS has smaller chainrings and no chainring bolts and is the same weight, but the powermeter version is significantly lighter. Does that mean that they somehow lowered the weight of the PM by 140g or most of the PM internals are present even with the non-PM cranksets?

Aeo
Posts: 76
Joined: Wed May 25, 2016 2:06 am

by Aeo

Hambini said in his last video that he is making T47 bbs for Trek

wolfesquire
Posts: 264
Joined: Wed Feb 09, 2011 3:03 am

by wolfesquire

What is the benefit of T47 bottom bracket?


DCcyclist
Posts: 75
Joined: Tue Aug 22, 2017 2:09 am

by DCcyclist

Stitchking wrote:
Mon Sep 23, 2019 12:21 am
here is a leaked artists rendering
s-works-tarmac-sl6-disc-dura-ace-di2_13178.jpg
This is rude man :D
2019 Giant TCR Advanced Pro 0 Disc

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