Just got a new gravel bike - it has GRX 1x12 with the 10-51 cassette. Compared to my previous bike with GRX 1x11 11-42 the lever action to shift down gets quite heavy and wooly feeling as you go up the cassette. Perfectly usable but I'm wondering if anyone with 1x12 has any experience.
Cable is Fibrax, internally routed and exits the chainstay very close to the derailleur so the loop is very short and quite acute.
Bike is Sonder Camino Ti. Really like the bike but curious about this.
Not surprised with that dinnerplate
#2xFTW
Could put an old Avid Rollamajig on ther to help eith the tight cable bend.
Is it a full cable run or separate section? It looks like I can see a ferrule at either end, so a short bit. If so, according to the shimano technical documentation this length shouldn’t be fibrax, but instead the really flexible coiled outer shimano ot-rs900 - see “notice” on this page to see the length you need to cut it https://bike.shimano.com/en-EU/product/service-upgradeparts/shimano/WO-Y8ZG98090.html
It’s not “required”, but it makes a noticeable difference ime
Undo the cable and hold the inner in your hand and go up and down the gears. It should be smooth with ways if there's resistance it will mean the cable is being affected somewhere between the shifter and the mech. Maybe a kink so where or the cable being pinched by something. Also check cable route out of the shifter is following the proper guides
I thought Rollamajig for that. Perfect application.
Rollamajig... and we're back in the 90s 😀
I may actually have one somewhere...
Just looked at the picture and I think I'd want the outer cable at least 10cm longer too
The effort required/woolly feeling goes up as you move to bigger cogs. I'll drop the chain and see if that's still the case, and then undo the inner as suggested. Think I'll probably just swop cable to the Dura Ace one as well. Slightly annoying to have to faff with a new bike, but not the end of the world.
Mine doesn’t feel like that.
How you finding the bike generally, I'm quite seriously considering a Ti Camino. What size frame is it and do you have any toe overlap?
I agree with rocketdog, it looks to me that the outer is a bit on the short side.
How you finding the bike generally, I’m quite seriously considering a Ti Camino. What size frame is it and do you have any toe overlap?
I've only done one 40 mile ride so far - mainly undulating back roads with a couple of miles on well maintained estate tracks. Previous bike was a Nukeproof Digger. The Digger was a small and this is a medium but with 650b wheels and 50mm tyres. Fits me much better (I'm 5'7").
Very nice bike, neat welds on the frame, and, well, it's Ti so a thing of beauty. I've swopped the saddle for my preferred one, moved the brifters a bit and replaced the tape as I like thicker. Bars are Sonder Bombers which I like. Quite similar to Midge bars which I'm used to.
Rides nicely from what I've done so far - probably do something more off road tomorrow around Swaledale but not expecting any nasty surprises.
No toe overlap, and 50mm tyres on 650b probably is about the same OD as 700c and smaller tyres. Loads of clearance.
I live in the northern Dales and ride a lot here and the Lakes so I think the 51t cassette was a good choice. If that ends up meaning heavier shifting so be it - but I reckon its sortable. New Dura Ace cable on order as per the Shimano recommendation. If it fixes the issue I'll feed back to Sonder.
My only very minor dislike is it has a T47 bottom bracket. I don't know much about them but do know I'll now need yet another bloody BB tool!
No buyers remorse, that's for sure 😀 I have to say the buying experience with Sonder was excellent- ordered Saturday and delivered Tuesday morning. Had a couple of emails with their customer services and responses were very quick (like within the hour) and really helpful.
BTW I checked cable movement as suggested and its not particularly stiff or sticky. Shifts upwards pretty snappily so maybe the spring tension on the longer cage GRX mech is just greater due to the wider shift range. I'll fit the Dura Ace cable with a bigger loop and see what that does. Maybe it's just the tradeoff of a very wide range cassette. Problem isn't hideous, just a bit harder and less clicky than 11sp 11-42.
“with a bigger loop”. I’m a big fan of following the shimano technical manual I linked for guidance on that. Things have changed since the 10 speed and big loops days. That said, no harm in trying it longer and cutting it down if you still have issues.
