Any question answered...

Marin Pine Mountain 27.5+ 2019 or 2018.

Ah, they did have a weird fork, I think there was a recall on it. How much too long is the 135mm one? Would a 130mm road one do? Would a 100mm one do? Most of the threading in a lot of the nuts is right at the base with extra plastic added on to make it easier to use your fingers to tighten, so the skewers are longer than necessary.

Marin Pine Mountain

The stock hub is Joytech, presumably an OEM custom job specifically for that bike since by 2018 it was already well known to everybody else that QR hubs and disc brakes are a bad combination. Good luck getting a spare for that 🙂

As a dismal kludge while you're waiting for a new bike, or at least fork, you can trim and rethread a rear QR. If I were lumbered with that fork and a 15×110 hub I had to fix to it securely, I'd make an axle adapter with nuts or bolts. I did one from OTP parts to put a 20×110 hub into the 9×100 Pompetamine fork, but your use case is probably going to need custom parts as it's such an improbable starting point.

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Currently have a set of DT Swiss 1900 with adapters currently on, and I do have a make shift qr at the moment.
Why are disc brakes and QR a bad combination? Not really had any issues with that over the last 8 ish years with different bikes.
Why am I getting a new bike?

Why are disc brakes and QR a bad combination?

https://diskbrakesqr.wordpress.com/

Why am I getting a new bike?

You might not be, I wrongly assumed that since Marin had picked a deprecated fork end they might have been a decade behind the times at the other end and you'd be hunting high and low for a straight-steerer replacement. As it is, the lower headset is 1.5" so you shouldn't have too much trouble finding a fork to fit.

Currently not, no, but a new fork has crossed my mind, and probably, will now be an easier and better route.

Aha, nice one. Was struggling to find them that big.

and probably pretty much any other motorsports shop

Croydon Race and Rally used to be my local walk-in for stuff like that. Nowhere like that round here though!

Thanks for the offer - I’ll give you a shout if I get stuck. For the price of the ones in Tester’s link it’s not worth your bother setting up the cutter and going to the post office!

I did one from OTP parts

I’d like to do this with a 15mm hub if possible.. what parts should I be looking for?

what parts should I be looking for?

Ones which don't exist 🙂

There are plenty of 15×100 to 9×100 converters available because people wanted to put new wheels in common old forks. Your problem is that 9×110 is not common, yours is the first one I've come across. Boost hubs were designed to go in through-axle forks, and there were no legacy forks they'd go into even if there was a conversion axle since the disc line is not the same as old 9×100 and 20×110 hubs. All the 9mm through axles which might be the starting point for an alternative to a skinny 5mm skewer have the same problem as the skewers, they are designed for 100mm OLN hubs and will be too short for you. I have one in my bag of axle spares, and the maximum it could cover is 116mm over the outside of the fork ends.

In principle, the conversion kit I used was a tube, a length of studding and two track nuts. The last of these you can easily buy, but M9×1.0 studding is not anybody's idea of a stock item and again M9 front track hub axles are designed for 100mm OLN and won't stretch the extra 10mm.
You can buy M9×1.0 screws, so the bare minimum custom solution is a 14.9×109.5 rod with M9 female threads in each end, or the same with M9 male extensions each end to accept OTP track nuts.

I have one in my bag of axle spares, and the maximum it could cover is 116mm over the outside of the fork ends.

I checked the two within arm's reach (Shimano enclosed cam and Miche X-Light) and they're both about 123 mm with the cam closed and a minimum 3 turns of thread engagement.

I reckon there's enough variation in front skewers that a rummage through an LBS parts bin might find one that will work.

3 turns of thread engagement

You should be aiming for 10 turns (8mm on an M5 skewer). That takes you back down to the 117mm, i.e. 100 OLN and 8.5mm thick fork ends. Halo XL Allen key skewers are listed as 122mm max, so if your fork ends are 6mm or less thick they should work, in a limited sense. It's worth bearing in mind that Allen key skewers are even worse than QR skewers in terms of the disc brake wheel ejection issue referred to above, whereas track nuts are several times better than even a Shimano closed cam skewer.

Thanks

Any data on the QR vs hex skewer claim?

I’d have thought that a properly-lubricated Cr-Mo hex skewer has the potential for greater clamping force than a hand-applied closed-cam QR... Or is the torsion always too great over such a long and thin bolt?

Does there exist a 3 module single width grid switch?

I want to replace one which has 3 switches with 2 switches and a key switch, but not enough to want to do the decorating putting a double width back box in will require.

Edit: Aha! https://www.ebay.co.uk/itm/262841693124

Or is the torsion always too great

Think this is the issue

is the torsion always too great over such a long and thin bolt?

That's the issue. A cam operated skewer only has to resist tension, where the Allen key one has to simultaneously resist both the tightening torque and tension. It's not to do with the length, although in practice the wind-up of such a long bolt causes the same problem as uncorrected spoke wind-up. In general, the tensile yield limit of any threaded fastener is greater than the tension which can be generated by fastening, because the thread snaps at the first unengaged turn under the combined loading.

Why is it 14° on new year's eve in the North?

SUVs

Because of this:

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Bloody maps, I knew they'd be involved. Nice walk around in a t-shirt though so shouldn't complain.

This is what I assume to be the condensation waste pipe of my combi boiler. Is this likely to just go in to the ground? I want to know if I could lead a washing machine waste pipe in to it or not.

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are we supposed to love or hate Ian Hislop?

Bit of both I think.

My friend is selling a 2016 Cannondale Synapse Carbon Ultegra Di2, in very good condition (ridden around 200miles since new). He wants to offer it for a competitive price to move it on. What’s a fair amount to ask?
This model:

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