Weight Weenies

Hello, i have a problem, without the chain, when i put the rd in the large cog, it hits the spokes, but the jokey wheel is align to the 32 cog, the dropout is ok.

rsantos450 wrote: ↑

Thu Sep 12, 2019 10:11 am

Hello, i have a problem, without the chain, when i put the rd in the large cog, it hits the spokes, but the jokey wheel is align to the 32 cog, the dropout is ok.

This is unfortunately normal.

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The cage is stretched at least half way in this gear, so the jockey wheel then usually clears the cog.

Remember a chain needs to fit inbetween them too so there should be enough clearance. You can get more clearance by tightening the B-screw (to a point). If you're attemting to run a short cage derailleur with a 32t cassette you could experience poorer shifting in the small cogs and/or noise when going 2nd to 1st.

Had a buddy with the same issue. Dropped his chain, destroyed both rear wheel and RD.
SRAM just shrugged and offered to sell him a new RD, said "chain drops are unlikely".

As Tobin states, this is fairly common.

Note: I have eTap 11sp on three bikes. So I'm not negative SRAM.

alcatraz wrote: ↑

Thu Sep 12, 2019 2:30 pm

The cage is stretched at least half way in this gear, so the jockey wheel then usually clears the cog.

Remember a chain needs to fit inbetween them too so there should be enough clearance. You can get more clearance by tightening the B-screw (to a point). If you're attemting to run a short cage derailleur with a 32t cassette you could experience poorer shifting in the small cogs and/or noise when going 2nd to 1st.

He’s not talking about b-gaps or the pulley touching the cog. For some reason the bottom of the eTap RD cage bends inward toward the spokes when there is zero chain tension...so much that there is overlap/contact. Should your chain break when you are shifted into the first cog, you will probably destroy your derailleur and possible even take out some spokes.

spokes are cheap the replace, don't worry about it

ChiZ01 wrote: ↑

Thu Sep 12, 2019 11:18 pm

spokes are cheap the replace, don't worry about it

eTap derailleurs are not cheap to replace. Nor is it fun to have a ride ruined if you drop your chain and the cage slacks enough to fly into the spokes.

TobinHatesYou wrote: ↑

Thu Sep 12, 2019 11:24 pm

ChiZ01 wrote: ↑

Thu Sep 12, 2019 11:18 pm

spokes are cheap the replace, don't worry about it

eTap derailleurs are not cheap to replace. Nor is it fun to have a ride ruined if you drop your chain and the cage slacks enough to fly into the spokes.

what's the alternative? sell his groupset and lose money?

It's very hard to torque the first gear to the point of breaking the chain. Your speed would be very low too. I wouldn't ride around worrying about it, but I admit it's annoying that it has to do that.

If you weigh 100+ kg and try to sprint up a steep climb on a 25t cassette then that's a different story. Spinners need not worry.

Said buddy didn't break a chain when his incident happened. His chain dropped off the small ring. Bang.
Chain catcher would have helped, but really shouldn't be required these days.

Sure, maybe the FD was out a mm or two, but still, a design where its possible that the RD is perfectly set up and the cage still goes into the spokes is pretty bad.

Don't cross-chain and you shouldn't have the problem, as you won't be changing between chainrings while on the largest rear cog. In 40-plus years and about three-quarters of a million kilometres of cycling, I can't recall ever having a chain drop except when I was changing at the front.

I often stay in my big ring as long as possible, then shift down to the small ring while also shifting from the 2nd cog to the 4th cog. In fact this is SRAM's recommended shifting point with AXS as you can see here. I have also had one inner drop this season on a climb. Luckily I was not that far down the cassette that time, and also was able to get off the bike, fix the chain and get back to the leaders.

Yes, the cage makes contact with the spokes even in the 2nd position.

I Will post a video.

Enviado do meu POCOPHONE F1 através do Tapatalk

https://youtu.be/kbJTQFazqcU

Enviado do meu POCOPHONE F1 através do Tapatalk

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

www.starbike.com

Yes, we understood you from the first post. This is a well known feature (at least for anymore who has installed an eTap group).