[Closed] Two quick questions - Boost and Sram GX

Noticeable? Who knows. I have a set of Boost 29er wheels for my Pact but I've not felt the need to take the B+ wheels off.

Had gx since October, it's done me well in some challenging places 🙂 running mech, cassette and twist shift on my old x9 cranks with the removable spider.
Solid and dependable just done a cable tweak and that's it. Feels better than my xt 10sp not compared with 11sp up is lighter with more range.

Ok thanks

Bump for the morning crowd / already bored at work crowd.

My new bike has GX. It feels nice, good positive shifting, accepts multiple downshifts without any complaint, very quiet even in the largest sprocket. Feels better than XT 10 speed, can't compare it to XT 11 speed as I've not used it.

BUT I've done all of two rides on it so time will tell if this precision lasts!

Another new bike with GX owner here with roughly the same experience as richmtb. I put the feeling better than the 10 speed XT on my old bike down to it being new and not a few years old though. SRAM GX shifter took all of about 10 minutes to get used to after years of Shimano due to the "double thumb push setup". 1x took more getting used to as the gears are farther apart and so my "instinctive shifts" were off for the first few miles.

Boost's definitely noticable to your wallet and if it makes you clip your heels on the chainstays. Stiffness? Depends on the entire wheel, on the hub design too, same as a 135 wheel. And on you too.

SRAM seem to have screwed up with GX and made it too good. The cassette especially makes half their range pointless- they seem to have resorted to exaggerating its weight to make that less obvious! Not a big fan of the shifter feel on either GX or XT tbh, I went with an XT/SRAM mixup myself as GX wasn't out but I dunno what I'd do now. No 11 speed I've used is as nice as lovely Saint 10 speed 🙁

Boost on 27.5 makes no difference. It's only to accommodate ever widening cassettes. Plus one for gx

Maybe I am unlucky but I have just given up on GX. First derailleur lasted 4 rides before the clutch stopped working. That was warrantied with a new one which was faulty out of the box so just ended up getting a refund.

It was pretty good when working though. I do like the feel of SRAM. The shifter paddles I found feel better than Shimano being dedicated for thumbs where as shimano 2 way release feels compromised.

That said I will be replacing it with XT as I can't be bothered waiting 3 weeks when things fail.

Ok, so GX is a bit a case of wait and see perhaps.

And Boost is perhaps an issue for clearance and not necessarily necessary - if one's allowed to say that - for stiffness.

Thanks.

GX cassette and xt mech and shifter here.Would not touch SRAM moving parts with a barge pole.
Got hope ss hub (undished and wider bracing angle than boost) and geared hubs both with Arch's.No discernible difference in stiffness I can tell whilst riding.

Boost on 27.5 makes no difference. It's only to accommodate ever widening cassettes.

It makes no difference to how much space there is for the freehub as the dropouts are 6mm further apart and the hub flanges are 6mm further apart there is the same space left for the casette to fit into . Moving the hub flanges 6 mm further apart has to make a difference to wheel stiffness whether you can actually feel it or not .

So it does something that makes no detectable difference.....bonus 😕
Like shampoo making your hair 23% more loverly.

Ramsey Neil - Member

Moving the hub flanges 6 mm further apart has to make a difference to wheel stiffness whether you can actually feel it or not .

They key thing to remember about Boost and wheel stiffness, is that practically none of the people now telling you that you should buy Boost because the flange design makes a stiffer wheel, ever bothered to re-engineer the flanges on their 135mm hubs to give similar benefits.

Similiarly, lots of bike manufacturers who happily sold bikes with lacklustre flexy wheels will be saying the same, even though they never bothered to provide stiffer wheels back before it was a marketing buzzword. In fact a bunch of them will still be selling lacklustre flexy wheels, with boost hubs.

I must be the odd one out here, I think GX is really cheap and plasticky. I've got X1 and that's not brilliant IMO.
I think XT wipes the floor with both of them for quality and feel.........

If anybody wants to buy my X1 groupset (300 miles old, shifter, mech, cassette, chain) drop me a line....

EDIT
I might sell the cranks too

They key thing to remember about Boost and wheel stiffness, is that practically none of the people now telling you that you should buy Boost because the flange design makes a stiffer wheel, ever bothered to re-engineer the flanges on their 135mm hubs to give similar benefits.

How could they do that , they only had 135mm not 148mm to play with ?

Simple, taller flanges. (also, many hub flanges aren't as wide as they could be). Some manufacturers have made a point of this in the past but it's never really caught the imagination