2021 Trek Emonda SL/SLR

Discuss light weight issues concerning road bikes & parts.
alcatraz
Posts: 2676
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?

Stitchking
Posts: 179
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

by Weenie


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Stendhal
Posts: 263
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:
Cervelo Aspero (7.87)
Retired: S-Works Tarmac SL6, 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: 26
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: 5084
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: 16
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: 148
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: 273
Joined: Wed Feb 09, 2011 3:03 am

by wolfesquire

What is the benefit of T47 bottom bracket?


DCcyclist
Posts: 86
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

goatalope
Posts: 21
Joined: Sun Sep 04, 2016 3:14 pm

by goatalope

Saw a Trek Segafredo Instagram post saying they'll have the new Emonda at Criterium du Dauphine, which starts May 31st.

I'd be pretty happy with something that looks like the new Domane, but without any isospeed gizmos or internal storage. Room for plump 28s (I think the current model may even fit some 32s right now).

cajer
Posts: 212
Joined: Sun Jul 14, 2013 1:26 am

by cajer

Morkai wrote:
Mon Sep 23, 2019 8:18 pm
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?
My Dzero Quarq 110mm BCD and 165mm weighs in at 559g. Meaning you also gain ~150g with powermeter and the new T47.

chronsbons
Posts: 16
Joined: Tue Oct 29, 2013 6:05 am

by chronsbons

goatalope wrote:
Thu Dec 12, 2019 10:29 pm
Saw a Trek Segafredo Instagram post saying they'll have the new Emonda at Criterium du Dauphine, which starts May 31st.

I'd be pretty happy with something that looks like the new Domane, but without any isospeed gizmos or internal storage. Room for plump 28s (I think the current model may even fit some 32s right now).
What post? Take a screenshot and share it here!

jimmerjohn123
Posts: 26
Joined: Sat Jun 24, 2017 4:19 pm

by jimmerjohn123

goatalope wrote:
Thu Dec 12, 2019 10:29 pm
Saw a Trek Segafredo Instagram post saying they'll have the new Emonda at Criterium du Dauphine, which starts May 31st.

I'd be pretty happy with something that looks like the new Domane, but without any isospeed gizmos or internal storage. Room for plump 28s (I think the current model may even fit some 32s right now).
A light bike with threaded BB - it's all I ask for in my next bike. Trek's recent redesigns have been getting heavy lately

TobinHatesYou
Posts: 5084
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

jimmerjohn123 wrote:
Fri Dec 13, 2019 6:54 am

A light bike with threaded BB - it's all I ask for in my next bike. Trek's recent redesigns have been getting heavy lately

The next Emonda SLR frameset is all but guaranteed to be heavier. The current one is an aerodynamic brick, and Trek will be keen to fix that. Kamm shaped tubes are going to add weight in addition to the T47 BB. An integrated cockpit will add weight as well.

by Weenie


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