Electronic & Hydraulic Shifting (Di2, Ui2, customisations)

awesome. thanks

it's the last piece of the puzzle isn't it... it does spin very freely though?

i wonder whether the inertia of the slightly larger 34t cassette also has a role though. when you stop pedaling the cassette continues for a bit and causes the chain slap

Yeah, I've had this on my gravel bike. The little rubbery bastard can pop outwards and it grips the hub to the freehub creating a kind of clutched fixed gear :) Push it back in while swearing at it.

I've run 42T cassettes for a long time on Di2 and we've both run road Di2 on gravel bikes. There can be some chainslap but you'd have to big fangin' in the smallest cog and suddenly stop pedaling. It's basically a non-issue. If it's a consistent problem it sounds more like the seal thing mentioned, or maybe something needs a clean - like you've over-greased the freehub or something and it's sticking a bit too much.

thanks - will take a look at freehub once again :-)

Cheapest I've come across the SM-JC41 Junction B block anywhere: £15.99 at probikekit, free shipping on orders above £15.

Spins freely but have the tiniest bit of drag. I've done a few hope hubs services, put the rubber seal wrong = chain slap. It's the same with most brands.
If you're super lazy chug a bit of WD40 behind the cassette where the seal is, see how much better it gets (not a long term solution)

interesting. thanks. need to hand it to a shop probably

Calling all SRAM aficionados - is this amount of SRAM Red AXS good value for £1399? Would still need to get chain, cassette and chainset obvs

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Can you find it cheaper anywhere else? If not, it's good value

I can’t find it cheaper elsewhere, so in relative terms it’s a good price but is it a good price in general?

Retail is like £1600-1700 so looks like it.

6 bolt rotors are pretty useless in most bikes. The things that that groupset are missing are the real upgrades over Force/Rival

It's usually the other way around, when chain is on the 10t or 11t cog, the freehub has an advantage over the chain /chainset and rides on slapping the chain stay or causing chain to get thrown ofd.
Well sealed hubs (hope, i9, ck) naturally have more friction to over come. You can get proper freehub seal grease (even thinner than pawl grease), would very much use that and not a solvent like wd40 (which will work for today but make problem worse tomorrow) if your having freehub stiction issues.

I think we're talking about the same thing - big cassettes but when using them in the little cogs. That's where I get any chain slap and why I tend to descend in the big ring, whether I'm going to be pedaling downhill or not.

thanks - appreciate the advice

i actually handed the bike over to bike shop to diagnose an issue with the front brake (master cylinder has actually broken in the lever - thanks shimano........)

they took a look at the RD and were also slightly puzzled by the chain slap as the hub seems fine. they think the RD might be faulty too but i doubt it

Ok, thanks for the insight, that’s handy to know. I know nothing about disc setups for road bikes

Why oh why is eTube so shit? I don't have a PC so trying to set up some wireless units and both fail on the mobile app despite following Better Shifting advice.

I "borrowed" an old, shit laptop with a German keyboard from work that was due to be scrapped as the battery doesn't hold charge. It has one job; eTube. Of the many things Shimano do well, software is not one of them.

Not sure why they've not made a mac version. Surely there's got to be a big intersection between people willing to buy expensive groupsets and Mac users...

Apple has less than ten per cent of the global PC market. That's why Shimano don't do a mac version.

It's the culture wars. Apple and SRAM - Shimano and Windows

Campagnolo on OS/2.

But Shimano's users are a very specific part of the global PC market. I have a feeling (thats it, its a feeling) that a lot of people who spend 4k+ on bikes that go beep boop will fall into the 15%+ PC market share of Apple in the US.

Santa Cruz shouldn't bother with Sram's UDH, because SRAM has only about 15% market share of global bike component sales?

All this doesnt matter tbh, they cant even make a nice software for one platform, imagine if they had to develop and maintain two.

Why oh why is eTube so shit?

baffles me as well. so crap

I don't think it's necessarily even that specific. I suspect that if you take into account only private sales of PCs rather than corporate purchases then Apple's market share is already much larger.