Converting a GRX 1x to 2x
09-14-20, 03:16 PM
#1
Senior Member
Thread Starter
Converting a GRX 1x to 2x
My bike currently has a GRX drivetrain (1x) with the FC-RX810 42T chainring. I want to replace this with the FC-RX810-2 dual chainring (31-48T) which costs about $225. Of course, this if for the whole crankset. Is it possible to just buy a 48T and a 31T chainring instead of buying the whole set again? Or is my current crankset not upgradeable?
And I can't believe the shifter/brake lever for the left side (ST-RX810-L) costs $270!!! Pretty pricey! The front derailleur and a new chain are reasonably priced, but just getting sticker shock at replacing crankset and lever!
Thanks for any advice.
And I can't believe the shifter/brake lever for the left side (ST-RX810-L) costs $270!!! Pretty pricey! The front derailleur and a new chain are reasonably priced, but just getting sticker shock at replacing crankset and lever!
Thanks for any advice.
09-14-20, 05:15 PM
#3
Senior Member
what's the reason for the conversion? if you want wider gear range, maybe try different cassette or chainring first
09-14-20, 10:31 PM
#4
Non omnino gravis
I have found nothing stating that the FC-RX810-1 has the second BCD holes on it for the sub-34 chainrings. It might, but Shimano doesn't mention it, nor does any retailer.
ST-RX810-L $250
RX810-F $52
FC-RX810-2 $225
Ultegra Chain $30
...so about $560 to add a bit more gearing range. The cost of "upgrading" is IMO prohibitive. Doesn't help that GRX is new, so finding used/discounted is pretty much impossible.
Looks like it's time to N+1.
ST-RX810-L $250
RX810-F $52
FC-RX810-2 $225
Ultegra Chain $30
...so about $560 to add a bit more gearing range. The cost of "upgrading" is IMO prohibitive. Doesn't help that GRX is new, so finding used/discounted is pretty much impossible.
Looks like it's time to N+1.
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09-15-20, 05:24 AM
#5
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09-15-20, 07:54 AM
#6
Non omnino gravis
That would save the OP about $85, as the 48/31 chainring combo (at least if you stick with Shimano) is about $140. That outer ring is absurdly expensive.
For me at least, $475 is a bit too much to spend to add another gear up front.
For me at least, $475 is a bit too much to spend to add another gear up front.
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