Sloth
Senior Member
I have recently had my bike converted from a 105 2x to a GRX 1x. All is well so far.
However, since I collected it from the shop I have only ridden it a couple of times, most recently yesterday, when, for the first time since the conversion.
I have noticed 2 things, which may be very minor and easy to fix, possibly even just 'teething' problems since the conversion.
1/ When I stood on the pedals to 'grind' up a hill. (I have done this on this hill many times with no issue on the old set up), I noticed a metallic scraping or catching noise when I stood on the pedals, in time with my pedal strokes (roughly).
I tried it several more times on that ride, and even stood on the pedals on the flat near home, all with the same resulting noise.
It is fine when sitting and pedalling normally though, so perhaps something to do with the additional load when stood on the pedals to push up a hill etc?
Could this be my rear disc catching on the pads, due to frame flex? It didn't do it before though.
2/ The new GRX812 front and rear 42t/42-11 set up is great, and gives me all the gears I need personally. However, despite being very smooth to change, I have noticed a hesitancy/delay to change down from the 3rd smallest rear cog, to the next largest up (not up to a smaller cog). I have (at the suggestion of the LBS) turned the gear selector cable tension a 1/4 turn tighter, then another 1/4, but although it seems a little better, it has still got that intermittent hesitancy to change, at that same point only. It changes fine with any other selection. If I turn the cable tension any more could I cause issues with the gears trying to change on their own? Since making the cable tweaks, it already felt like it 'slipped' or tried to change on its own on one occasion, but it was only once....so far.
For information, I am using the 105 flat bar shifter as I am advise that it will work fine with the GRX.
I will of course speak to the LBS again, as they may need to make some adjustments, as they were the last ones to remove the rear wheel and work on the bike.
However, it would be good to get your opinions and see if these are just minor issues, easily resolved by myself?
Thanks in advance.
However, since I collected it from the shop I have only ridden it a couple of times, most recently yesterday, when, for the first time since the conversion.
I have noticed 2 things, which may be very minor and easy to fix, possibly even just 'teething' problems since the conversion.
1/ When I stood on the pedals to 'grind' up a hill. (I have done this on this hill many times with no issue on the old set up), I noticed a metallic scraping or catching noise when I stood on the pedals, in time with my pedal strokes (roughly).
I tried it several more times on that ride, and even stood on the pedals on the flat near home, all with the same resulting noise.
It is fine when sitting and pedalling normally though, so perhaps something to do with the additional load when stood on the pedals to push up a hill etc?
Could this be my rear disc catching on the pads, due to frame flex? It didn't do it before though.
2/ The new GRX812 front and rear 42t/42-11 set up is great, and gives me all the gears I need personally. However, despite being very smooth to change, I have noticed a hesitancy/delay to change down from the 3rd smallest rear cog, to the next largest up (not up to a smaller cog). I have (at the suggestion of the LBS) turned the gear selector cable tension a 1/4 turn tighter, then another 1/4, but although it seems a little better, it has still got that intermittent hesitancy to change, at that same point only. It changes fine with any other selection. If I turn the cable tension any more could I cause issues with the gears trying to change on their own? Since making the cable tweaks, it already felt like it 'slipped' or tried to change on its own on one occasion, but it was only once....so far.
For information, I am using the 105 flat bar shifter as I am advise that it will work fine with the GRX.
I will of course speak to the LBS again, as they may need to make some adjustments, as they were the last ones to remove the rear wheel and work on the bike.
However, it would be good to get your opinions and see if these are just minor issues, easily resolved by myself?
Thanks in advance.