New Shimano Gravel GRX Groupset
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New Shimano Gravel GRX Groupset
Postby AUbicycles » Wed May 08, 2019 4:40 am
Road style brakes / shifters with MTB style rear derailleur. It runs in 10-speed and 11-speed mechanical and 11-speed Di2 (electronic). In addition there are brake calipers (400 and 800 series) and one wheelset. 1x and 2x are possible (if I read correctly).
https://gravel.shimano.com/en/components
One thing I noticed was some cross-compatibility - something which was not easy (but not impossible) when connecting Shimano MTB and road gear. The exact limits and options need a bit more investigation.
Also noticed 4 standard crank lengths 165, 170, 172.5 and 175mm.
The shifters / brakes have a concave type profile, unlike the convex profile in road shifters. I noticed a 'sub-brake' level - like MTB type brakes and it appears that it can be used in combination with dropbar brakes... so essential two brakes ... It reminds me of the suicide levers that were popular years ago but as a hydraulic type system (and a modern braking system) I don't anticipate the same issues... however can mean a rethink or even optimisation of the handlebars to deliver enough space.
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Re: New Shimano Gravel GRX Groupset
Postby 10speedsemiracer » Wed May 08, 2019 6:58 am
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Re: New Shimano Gravel GRX Groupset
Postby 10speedsemiracer » Wed May 08, 2019 7:32 am
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Re: New Shimano Gravel GRX Groupset
Postby Calvin27 » Wed May 08, 2019 8:45 am
The golden era was when SRAM had 1:1 actuation across their entire 10 speed range. This basically allowed myself and a few others to do all sorts of crazy 1x11-40 monstercross setups that would be impossible without a lot more stuffing around.AUbicycles wrote:
One thing I noticed was some cross-compatibility - something which was not easy (but not impossible) when connecting Shimano MTB and road gear. The exact limits and options need a bit more investigation.
These days though I don't really see a need because even road gear has gotten some decent cassette range.
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Re: New Shimano Gravel GRX Groupset
Postby gsxrboy » Wed May 08, 2019 10:18 am
So looking at my riding, cadence and the gears I generally use in commuting and when I toured on a 44/36 11/28, a 1x 32 (likely oval) and 10/33 12s Force would be even better and more useful than anything in this new groupset.
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Re: New Shimano Gravel GRX Groupset
Postby MichaelB » Wed May 08, 2019 12:18 pm
I'm with you here.Calvin27 wrote: ...
These days though I don't really see a need because even road gear has gotten some decent cassette range.
Currently running 10-42 & 36/46 with RX800 RD and std road crank with compact BCD. Sure it requires a fair bit of B screw, but still works and gives me a good low end, and sensible top end.
Winner !!!
Only curious whether the GRX levers have the same cable actuation as the road shifters.
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Re: New Shimano Gravel GRX Groupset
Postby Calvin27 » Wed May 08, 2019 4:05 pm
I'd give the brake lever pivot points though. One of my problems is even with hydro, the hoods need a lot more brake force when on the tops.MichaelB wrote:Only curious whether the GRX levers have the same cable actuation as the road shifters.
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Re: New Shimano Gravel GRX Groupset
Postby singlespeedscott » Wed May 08, 2019 4:43 pm
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Re: New Shimano Gravel GRX Groupset
Postby 10speedsemiracer » Wed May 08, 2019 5:15 pm
GCN review of GRX
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Re: New Shimano Gravel GRX Groupset
Postby ironhanglider » Wed May 08, 2019 5:19 pm
I am right with you here. I can't push big gears anymore, besides there is less friction in bigger cogs.gsxrboy wrote:I always wonder why they don't start the cassettes at 13 or 14 and fill in a few more holes at the larger end. For the target usage, being able to drop into a 11 and do 50kph at xx cadence seems a bit daft on most gravel/adventuring.
Cheers,
Cameron
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Re: New Shimano Gravel GRX Groupset
Postby MichaelB » Wed May 08, 2019 6:12 pm
I was referring to the FD & RD cable pull, not the brake actuationCalvin27 wrote:I'd give the brake lever pivot points though. One of my problems is even with hydro, the hoods need a lot more brake force when on the tops.MichaelB wrote:Only curious whether the GRX levers have the same cable actuation as the road shifters.
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Re: New Shimano Gravel GRX Groupset
Postby 2wheels_mond » Wed May 08, 2019 9:40 pm
Yes to both, but the front needs to be used with the 2x GRX crankset.MichaelB wrote:I was referring to the FD & RD cable pull, not the brake actuation
See the compatibility chart here: https://productinfo.shimano.com/#/
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Re: New Shimano Gravel GRX Groupset
Postby MichaelB » Thu May 09, 2019 8:36 am
Thanks for the link.2wheels_mond wrote:Yes to both, but the front needs to be used with the 2x GRX crankset.MichaelB wrote:I was referring to the FD & RD cable pull, not the brake actuation
See the compatibility chart here: https://productinfo.shimano.com/#/
The way I read the Compatibility chart, the new GRX FD needs to be paired with the GRX crankset, due to the +2.5mm movement outboard for wider tyre clearance, but I'd only be using the new GRX levers on an existing setup, so the crank and FD are road units.
And it seems to confirm GRX levers are fully compatible with Road derailleurs.
Now just gotta find somewhere to buy them from !!! Need either the RX810 or RX600 Shift lever set
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Re: New Shimano Gravel GRX Groupset
Postby Ross » Thu May 09, 2019 7:28 pm
Not coming to Oz until July or August. Maybe OS a few weeks earlier, according to Cycling TipsMichaelB wrote:
Now just gotta find somewhere to buy them from !!! Need either the RX810 or RX600 Shift lever set
https://cyclingtips.com/2019/05/shimano ... o-weights/
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Re: New Shimano Gravel GRX Groupset
Postby Duck! » Wed May 15, 2019 9:11 am
Shifter internals are the same as road models - RX400 <-> 4700 Tiagra, RX600 <-> R7000 105, RX810 <-> R8000 Ultegra.MichaelB wrote:I was referring to the FD & RD cable pull, not the brake actuationCalvin27 wrote:I'd give the brake lever pivot points though. One of my problems is even with hydro, the hoods need a lot more brake force when on the tops.MichaelB wrote:Only curious whether the GRX levers have the same cable actuation as the road shifters.
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Re: New Shimano Gravel GRX Groupset
Postby Mububban » Sat Sep 28, 2019 5:18 pm
Basic summary:
RX815 = equivalent to Ultegra Di2
RX800 = Ultegra
RX600 = 105
11spd available in 1x or 2x.
RX400 = Tiagra (2x10 only)
Gearing options:
1x = 40 or 42t chainring
11-40 or 11-42 cassettes
Any 11 speed cassette is theoretically compatible
2x = 48-31 or 46-30 chainrings
Clutched rear derailleur
2x rear derailleurs can handle up to 34t cassettes
New levers prioritise braking via the hoods for drops and descents, which gravel riders tend to prefer vs using the drops.
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Re: New Shimano Gravel GRX Groupset
Postby lone rider » Fri Jul 01, 2022 10:49 am
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Re: New Shimano Gravel GRX Groupset
Postby warthog1 » Fri Jul 01, 2022 10:59 am
Works well. Very happy with it.
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Re: New Shimano Gravel GRX Groupset
Postby Retrobyte » Fri Jul 01, 2022 12:42 pm
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Re: New Shimano Gravel GRX Groupset
Postby nezumi » Mon Aug 01, 2022 3:12 pm
2015 Merida Scultura 5000
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Re: New Shimano Gravel GRX Groupset
Postby owly » Tue Aug 16, 2022 8:44 am
Alexscycle Japan has some 8...level components, apart from cranksets.
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