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The sub-brake lever: This is a nice touch, the sub-brake lever you can put close to the stem. And I’d rather go with a bigger cassette than with smaller chainrings Going beyond the Shimano gear range recommendation for 2x? Shimano says no, I say …. But it certainly works on an Exploro and on other bikes, you can always try with the cheapest 11-36T cassette you can find. I just can’t guarantee it as it depends a bit on the geometry of your bike. This works on most bikes without a problem.
GX WORKS 2 WHAT IS M8000 INSTALL
So you need to be very careful in the setup to make sure that the chain length and chain tension keep the chain from swinging into it.Īnother way around that is to ignore the 11-34T max cassette size Shimano recommends and install an 11-36. On gravel bikes with dropped chainstays (which means pretty much every gravel bike, since they all copied the OPEN UP and 3T Exploro that pioneered it), a 30T inner ring puts the chain very close to the chainstay. On the positive side, Shimano’s cranks come with very small inner rings (30T or 31T) so that your smallest gear can still be pretty small (30×34).īut it may come at a cost. This means the biggest cassette you can run with this setup is 11-34. You can go a little further (which is why the 10-42T cassette also works), but it cannot handle another 16 links that you gain or lose when you shift between the front rings.īottomline, for 2x you need the RX-810 derailleur (RX-815 for Di2), with a larger 40T capacity (yeah!) but a smaller max cog size of 34T (boohoo!) And for 2x, it needs be able to store both the tooth-delta of the cassette AND the delta between the front rings.įor the 1x rear derailleurs mentioned before, the capacity is 31T, which is already used up by just an 11-42 cassette. The capacity is the total numbers of teeth (really of chain links) it can “store” in its zig-zag shape. That is not endorsed by Shimano but it works flawlessly in our lab and outside.Ĭombining the GRX RX-812/RX-817 rear derailleur with a SRAM 10-42 cassette? Shimano says no, I say go.Ģx gearing: Quick rear derailleur basics, every derailleur has a maximum cog size it can handle AND a capacity. You can run Shimano 11-42 cassettes, or 11-40 for those who want a bit tighter range. And there is no reason to restrict this to gravel, you can put them on your dedicated road bike too if you like them.ġx gearing: TheRX-812 rear derailleur (RX-817 for Di2) is specifically for 1x and can handle up to 42T for the biggest cog. The difference over regular Shimano road shifters is remarkable this is really a major step forward.
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I prefer the mechanical shape, it feels more natural in your hand. The mechanical shift/brake lever ergonomics on the hoods and while braking from the hoods are fantastic.Īs you can see above, the mechanical and Di2 versions are different. And Shimano has also changed the angle of the levers and the pivot point to make it much easier to brake from the hood position. Of course ergonomics are subjective, but a lot of people will love how these levers feel on the hoods. In general the 10-speed bikes are sort of Tiagra level, the 11-speed bikes are more Ultegra level. And within those, they also have a few different versions. The range: The new GRX range includes 1×11, 2×11 and 2×10. I won’t review each piece in detail, but pick out the things that are interesting and really matter: GRX is a groupset designed from the ground up for gravel, with proper 1x and 2x options, wide range cassettes and some clever features. But it lacked the wide range cassettes and 1x options to really be a serious alternative in this SRAM-dominated gravel market. After all, SRAM’s Force1 and subsequent groupsets are great gravel groupsets too)Ī small preview of things to come appeared last year, when Shimano introduced Ultegra RX, a few gravel components that you could combine with regular Ultegra parts. (Shimano claims “first gravel groupset”, but that’s more marketing speak and playing with the definition of words than that it reflects reality. So let’s start with the newest gravel groupset, Shimano GRX.
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And then you start to tinker, but you don’t want to end up with problems out in the field.
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GX WORKS 2 WHAT IS M8000 SERIES
The goal of this series is not to give in-depth reviews of products, but rather to highlight the few things that really matter and to solve a technical problem you may have with getting these part to do what you want.īecause let’s face it, gravel riding and racing is so individual, so dependent on where you ride, how you ride, how fast you ride and the skills you have, that the “standard setup” may not always work for you.