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Questions tagged [grx]

GRX is a Shimano groupset targeting gravel bikes.

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Shimano GRX chainring upgrade

i was thinking of upgrading my GRX FC-RX600 crank which has 46 tooth only and since i ride mostly flat sections, i want more teeth on my big chainring since i am running out of gears. thus the ...
macman's user avatar
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2 votes
1 answer
191 views

Is Shimano GRX Di2 Bluetooth compatible?

Can I connect Shimano GRX Di2 via Bluetooth to E tube project software?
Steve Simpson's user avatar
3 votes
1 answer
316 views

Having a double chainring and 11-42 cassette on a GRX 11-speed: goat link/tanpan vs cage swap

For some niche cases, gravel riders would appreciate to use wider range cassettes (11-40, 11-42 or 11-46) on their double chainring gravel setup, which would allow have ranges close to 600% (vs 507% ...
Rеnаud's user avatar
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Why is my bike making a grinding and clicking noise?

I recently received my new Canyon Grizl CF SLX 8 with a GRX Di2 2x11 groupset. Fresh out of the box I put it in my stand to go through the gears. I immediately noticed a constant clicking noise like ...
Jesper Sommer Jense's user avatar
1 vote
2 answers
541 views

Flatbar shifters for 11-speed GRX groupsets

I have a GRX RD-RX810 rear derailleur and I need a compatible (thumb) shift lever for flat bars. Any suggestions which shifters are compatible for my setup?
Guillermo Guevara Rodriguez's user avatar
5 votes
4 answers
688 views

GRX 2x11 - what causes the chain to bounce significantly when shifting the cassette into a higher gear (smaller sprocket)?

I recently set up a new gravel bike with all new components, including a 2x11 GRX DI2 drivetrain. 31/48 and 11-36t. It has ridden under 600 miles and only seen rain once. It is accident free and has ...
jonatans's user avatar
4 votes
1 answer
310 views

Is it normal for rear derailleur tension to impact front derailleur tension?

I just received a bike from a bike shop. It has a GRX800 front derailleur (FD) and rear derailleur (RD). When taking a look at the derailleur setup to check if it is alright, I found something very ...
Daniel's user avatar
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2 answers
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Differences between FC-RX600-11 and FC-RX600-10?

Is there any documented difference between 10- and 11-speed GRX cranksets FC-RX600-10 and FC-RX600-11? Net search gives "closer chainring spacing", but I'm looking for a proof. Also ...
Konstantin Shemyak's user avatar
0 votes
1 answer
195 views

Does an XT rear shifter fit a GRX RD (both 11-speed, mechanical)?

Gravel bike specs: • Shimano XT 2x11 shifters, mechanical • Shimano GRX FD & RD, 11-speed/mech • 105 crankset, 50-34 The rear shifting is not smooth, especially when I transition to the 4th gear. ...
ice_juggernaut's user avatar
1 vote
2 answers
436 views

Campagnolo 2x11 Record with GRX derailleurs

I really don't like the Shimano 105 levers on my bike. I would like to switch them in favour of Campagnolo 2x11 Record, and would like to know if anyone tried to fit them with GRX system: Front ...
mrzob's user avatar
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Fitting SHIMANO GRX FC-RX600 46/30 Chainset (11spd) to a road bike

Is it possible to fit the cyclocross GRX 48/31 chain set to a road bike? I have a SRAM Red eTap shifting on my road bike. This restricts me to a 10-28 cassette. I am about to take on a very hilly ...
George Craig's user avatar
4 votes
1 answer
353 views

Compatibility of Dura Ace SL-BS79 bar end shifters with GRX RX400 derailleur

Are road 10s 2x10 Dura Ace SL-BS79 bar-end shifters compatible with gravel GRX RX400 derailleurs 2x10?
guyfromthesun's user avatar
6 votes
1 answer
1k views

Loud clunk moving to smallest sprocket

When I shift gears to the smallest sprocket it makes a very loud clunk sound. There's also a lot of movement in the chain, like a bounce. I've taken a video demonstrating this Video of clunk I'm ...
nblackburn's user avatar
1 vote
1 answer
291 views

Broken screw thread on GRX 800 crankset

I made my gravel-dream bike few month ago by hand. I followed all the user-manual sheets from Shimano in order to properly mount the GRX 800 crankset and the pedals on it. I respected the tightening ...
mrzob's user avatar
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1 vote
1 answer
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Shimano GRX Hub + CS-M8000

I fitted a second (nearly identical) wheelset, and now my derailleur indexing is not working. Shifting into the last sprocket is not working, and there are a lot of gears over the range not working ...
a1o 's user avatar
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4 votes
2 answers
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GRX800 position

I got a bike from chainreaction with GRX groupset on it. The rear derailleur is not aligned with the cassette. I think the hanger got bent during delivery, but the guy at the local shop says it's fine....
kimreik's user avatar
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2 votes
1 answer
3k views

Replacement/substitute for a GRX 600/800 crankset

I'm currently building a gravel bike from (almost) scratch. Due to the lack of availability of the GRX crankset in Europe, I'm looking for a replacement part of the 2x11 GRX 600/800 crankset. So my ...
mrzob's user avatar
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2 votes
1 answer
432 views

Chain pops up while backpedaling in highest gear

Backpedaling on highest gear (11t) causes chain to pop up/out off at the front top part of the smallest cog. The bike and all components are very new and stock. This is a 1-by Shimano GRX Drivetrain. ...
digitopo's user avatar
1 vote
1 answer
546 views

From Deore MTB to GRX Gravel

I want to convert my MTB to gravel, and the main issue for me is the transmission. I plan to completely replace the transmission with 10x2, because it is pretty worn out. However, for me the main ...
Weird one's user avatar
5 votes
2 answers
1k views

2021 Salsa Fargo and GRX 2x11 components

I’d like your advice on GRX component with 2021 Salsa Fargo frameset. I didn’t research enough prior to purchase, and I found out that Bottom Bracket size was wrong, and even more, GRX may not work ...
masacchi's user avatar
3 votes
2 answers
2k views

Shimano GRX Hydraulic Disc Sub Brake Levers with 105 groupset

The GRX groupsets seem to be compatible with common road groupsets (Tiagra, 105, Ultegra) which was also pointed out in this answer. Furthermore, a brief news article by Shimano states that the brake ...
albert's user avatar
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5 votes
2 answers
1k views

Shimano Cassette Size Change

I recently purchased a wahoo kickr core and I picked up a Shimano Tiagra CS-HG500 11-32t cassette to put on it. Currently I am running an CS-HG500 11-34t cassette and GRX400 setup. Shimano's website ...
Jason R Miller's user avatar
0 votes
1 answer
754 views

GRX 815 STIs with XT 8120 4-piston caliper?

I want to use the XT 8120 4-piston caliper to my GRX 815 STIs to increase my braking power. After researching, I still haven't found a definite answer. I've also looked into the Hope RX4+ 4-piston ...
GrandXark's user avatar
3 votes
1 answer
547 views

GRX FD-RX400 - full outer model?

I'm just mounting the GRX FD-RX400. In the manual it says "if using a full outer model, ensure..." What does full outer model mean and should I do that? :)
Ola's user avatar
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6 votes
2 answers
2k views

Shimano GRX 2x10 crankset compatible with mtb front derailleur + shifters?

I would like to replace my existing MTB crankset with a GRX crankset to get a bigger outer chainring (cannot find anything for my existing crankset, FC-M4100-2). Does that even work? I'm trying to ...
Ola's user avatar
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