Going from 11-34 to 11-40

[B4_Ford]

Originally Posted by zennmotion

You can get a knockoff "derailleur hanger extension" for much less on ebay if you want to try it out. I have a cheap one and it works fine.

Wolftooth is $22 on Amazon. I think it falls within my budget.

[B4_Ford]

Not sure if the Roadlink or Roadlink DM is better. Instinct say the DM as it has one less point of failure.

[Duvivr6]

Like other have stated 11-40 works with GRX 810 the 2x rear derailleur. That is what I have on my bike with the 48/31 crank. I would say it's could be fine with 50/34 with the right chain length.

On the road side, I have tried an 11-36 on my r8000 and on R7000 and it works perfect. Have not gone 40.

I have done both the road link 10 and 11 speeds for the r8000 and GRX derailleur didn't feel it made a huge difference. It looks cool 😎.

[NHAero]

Originally Posted by B4_Ford

Not sure if the Roadlink or Roadlink DM is better. Instinct say the DM as it has one less point of failure.

IIRC the DM is what I used when I was fooling around with an 11-40 on my Anderson, with an R8000 RD.

[Wunder]

I've managed to use an 11-40 XT cassette with an R7000 GS rear derailleur and 50/34 front rings. It just worked WITHOUT a road link but did require the B screw dialed all the way in and a perfectly sized chain. Shifted well and could use 50/40 without binding (although derailleur angle was fairly extreme) and the 34/11 without dragging (although again close). As a rule I would stop at the 50/35 and 34/15 but overall it worked quite well. That bike is now back to short cage with an 11-32 (didn't need the gearing outside of the event for which I swapped it).

[xnetter]

I'm also running the XT 11-40t cassette on one bike. I'm running the GRX 46/30t cranks paired with an R7000 GS RD fitted with the Roadlink DM and it works really well. Plenty of range of adjustment. I'm a spinner so I really like the low-end climbing gears.

Before I installed it, I read that the R7000 RD could probably handle the shifting without the Roadlink but when I mocket it up, it looked too close to maxed out for my preferences.

KJ

[B4_Ford]

Picked up a Wolf Tooth Roadlink DM today. Definitely solved the clearance issue. Now to finish building.

[oldpotatoe]

Originally Posted by B4_Ford

I’m in the process of putting together a parts bin build on a Fierte IT. Groupset is a 105 R7000 series except for the rear derailleur, which is an RX-800. Front chainrings are 50-34. I was going to install a CS-HG700 11-34 cassette, but then I started to consider an XT 11-40. The extra gearing would be useful for the hills and mountains around me (I’m kind of old with a bad hip so I need all the help I can get). Has anyone run this sort of setup and will it work well or is this a fool’s errand? Biggest cassette I’ve ever run is an 11-34.

Think it'll be fine with that rear der. Only 'issue' will be some of the earlier and bigger gaps in the cassette compared to a 11-34.