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40c regular marathons, but we're a heavier team (edit: around 160-165 kg), and the tandem is set up for relaxed riding.

I just bought a Chris King headset for our tandem that has a 1 1/4'' threaded headset, which also goes by the name EC37, so could be the same. The CK was expensive (but worth the investment for the tandem in the long run), but I could literally not find anything else. I hope you have better luck than me.

A quick update if anyone's interrested:

I ended up placing the order on eBay wednesday, and the parcel was shipped from Bangkok with DHL Express the next day and arrived this morning in good condition. DHL made it extremely easy to deal with all the tax stuff compared to Post Nord in Denmark, and I believe it was even out for delivery before I made the payment.
The headset looks brand new as advertised, and came with Chris King instructions. Judging by the looks of the label on the bubble wrap/plastic bag, it has been sitting on a shelf in a shop for some time.

All in all a very good experience, I would not hesitate to order from this seller again.

Yes, I agree with that.

Thank you for the second opinion both of you, I will go ahead and order one later.

Thanks for the response, what do you mean by industry cost? The price vendors pay to CK before they sell to end consumer?

As you say, I would expect that PayPal would side with me if the item doesnt show up, I've had good experinces with that before. My main concern is probably if it could be a fake item of poor quality, which may be harder to prove in a dispute (also because I've never seen a CK headset before, so I would not know how to tell).

Sorry if this is the wrong place, I can't post in the Classifieds forum. Let me know if I should move the post.

I'm looking for a 1 1/4'' threaded headset for my tandem, and the CK 2Nut comes in this relatively rare size. I have now found this (below) on ebay, but it's from a seller in Thailand and the price is less than half of what I've seen elsewhere (further below).
Do you think this is a fake CK headset, or a scam in an other way?

https://www.ebay.co.uk/itm/HSL3S-Chris-King-2nut-Headset-1-1-4-silver-straight-steerer-tubes/283751818706?hash=item4210ed25d2:g:KnUAAOSw6WleJtYK

The other I've found:
https://www.hibike.com/chris-king-2nut-thread-headset-sotto-voce-logo-ec37-31-8-ec37-33-p4ec1e497186e83e88bdfa3dc8c626a61#var_31394796

Thanks!

Don’t want to risk doing it myself (although quite fancy developing wheel building as a skill eventually - maybe now I’d the time!).

It may be easier than you think. It requires a good amount of patience, but it's not that hard actually.

I had no wheel building experience what so ever, and bought Roger Mussons book (pdf) on the subject three years ago. I build a set for my road bike, and a set for my commuter/tourer while learning, and both are still going strong with no need for adjustments yet.

And you could always pay a pro builder to have a look at them when you're done, if you want to be sure they will hold up.

Does anyone know if a Tubus Tara front rack will mount with level horizontal stays on the 2019 straight fork?

Also, do you think the current 725 complete bike having thru axles is a sign that they are coming to the 725 frameset option as well instead of the QR? I think it would make sense, and I don't understand why they haven't made the move yet.

@jontea
It was a little hard to measure precisely, but this might give you an idea of what will work.

Rear tire width is 36,9mm
Front tire width is 36,8mm

Seat stay
Distance to tire is 12mm on each side.
Distance from outer edge of rim to bottom of seat stay bridge is 51-52mm.
Chain stay
Distance to tire is 9mm on each side.
Distance from bridge to tire is about the same, maybe slightly more
Fork
Distance to tire is about 15mm on each side.
Was not able to measure top, but looks like its the same.

Let me know if you have any other questions!

Thank you, @jontea, I've since changed the bars, saddle and brakes, and added a pizza rack with a wald basket. Love how it is right now, I consider it pretty much finished.

I run 38c Paselas which measure about 36mm, with 45mm sks longboards. The mudguards fits perfectly, and there's room for the tires as well, but I would not go much wider to be honest, maybe a 38 or 40 would be okay - with those mudguards.

I'm not sure about clearance without mudguards, but I can measure it tomorrow and take some pictures.

Thanks, I think it has turned out pretty good.

that's really nice, I'd love to have the space for something similar.

Yeah, I'd love to have the space for it as well haha, storring it in a 2 bedroom apartment on second floor can be a challenge sometimes.

That’s really nice. I agree on the hammered mudguards, it makes it
look sweeeeet.

I used to own one of those, it was a really nice bike, but I had some
issues with the canti spacing and the headset you mention. Plenty of
bottle cage mounts though. Unfortunately I couldn’t keep it as the
front didn’t fit me, so the captain bought it.

I remember the headset being 11/4 though? I could be wrong, but better
to double check on me before you order CK.

The canti posts do sit closer than on my Macho Man, and the Deore v-brakes barely fit, but I noticed the other day, that I could probably switch the unevenly sized conical washers around to move the pads out a little.

Look on the bright side, at least CK 1¼" (pretty sure that's what it will be, not 1.5") is cheaper than NOS Record OR or XTR in that size :)

You and Simba are right, I remember it's the EC37 cup size, so that's a 1 1/4'', thanks.

How do you find the handling with that much load on the pizza rack?

I have one too, but have been hesitant to load it up too heavy, because I easily feel the load sits more in front of the feel than on the wheel compared to my Tubus Tara low rider. So instead of turning the load, it feels like im "swinging" it around, if that makes sense. But maybe I'm doing something wrong, and I would love ot be able to take advantage of the awesome platform for more than just daily commutes.

Thanks, it's great, really feels like a quality frame. Made from True Temper in the US, and it fits both of us very well.
The only sort of downside is the 1 1/2'' threaded headset, as it seems Chris King is the only one making that size nowadays, and they are quite expensive - but maybe it's worth, the current headset is indexed to a point where I can actually feel it when we're riding.

Bought this last summer, and have been changing some parts during the year. We're planning a weekend trip to a local island with 30-40 km of cycling each day, so we took it for spin today to get a feel for the new bars, stem, seat posts and stoker saddle.

I'm running a 38/24 Deore double crank on my Trek 520, and I ran into the same problem with the bottle bolt when trying to set up my Tiagra front derailer. I had an Alivio triple front derailer in the low clamp version laying around, and I managed to make it work with my Tiagra STI's. The cage now sits flush with the big ring, and the shifting is pretty good.

I'm not sure if it would work with your shifters, but it could be worth a try - just be a aware of the cage not hitting the chainstay when in the small ring.

edit: Tiagra 4700 STI's, if anyones interrested.

I'm forced to mount my Tara the "wrong" way on my Trek 520, and I have had no problems configuring my ortliebs to still be able to hook onto the lower part of the rack. In my experience it makes no difference at all which way it's mounted.

Not 42c, but the Paselas come in 38c as well. I have them on a pair of 19mm internal width rims, and they measure out to about 36,5 mm. Highly recommendable.

I've read good things about the Schwalbe Marathon Supreme and Marathon Almotion as well, and they come in 42 and 40c. Don't let the Marathon name fool you, they're supposedly not as "dead" as the Marathon Plus.

+1 for a mixte.
I build one on a Panasonic trekking mixte frame i found on german ebay kleinanzeigen for my gf three years back that she is still riding. It has taken three iterations of bars to get the position right, but the Ergotecs from Rose are cheap, so it' fine.

Okay, that makes sense.

But then I can't see why you could not use it in a 2x setup? The only downside would be that the jockey wheel could end up further away from the cog than with a conventional RD, but it would still be laterally aligned with the cog.

Are you sure about this? I can't see how the lateral movement of the jockey wheel is controlled by the chain length? It just looks like the distance from the cog to jockey wheel is controlled by the chain length, but the lateral movement is still controlled only by cable.

It sounds like that is actually the whole point of x-horizon, that vertical forces like chain slap wont move the parallelogram and thereby the jockey wheel laterally to create "ghost shifting".

I'm no engineer, but that's what I get from the below links.
https://www.youtube.com/watch?v=bQEMySJX0DA

https://www.sram.com/sram/mountain/technologies/x_horizon

Dont know if it has been posted here already, but this new offering from Whisky Parts just popped up on insta:
https://whiskyparts.co/forks/no.9-cx-disc-12-straight

1 1/8 straight steerer, flat mount, 12mm TA, fender mounts.

Okay, the weight limit for the Tara is 15 kg, so I will be careful of that.

Did you ever have problems with them being scraping against the ground when turning?

Does anyone have experience with mounting Ortlieb Backrollers on a Tubus Tara front rank?

Thanks for the input, you're not making this easier for me.

Thanks, I like it a lot too. The frame came with a clear plastic sticker sort of chain stay protector, and its still going strong.

It has plenty of braking power and also good modulation in dry weather. The reason I've considered moving to disc brakes is the performance in wet weather, which I'm not completely satisfied with. I commute year round in any kind of weather, so it's just been bugging me lately. And on top of that, I have this maybe farfetched feeling that disc brakes doesnt leave the same amount of black dusty dirt on the bike as rim brakes does.

That said, I have no other experience with disc brakes than my hydraulic deores on my mtb (not the GT from this thread, I've since replaced it with a Specialized Chisel), which I havent ridden in wet weather, so I'm basing this desire for disc brakes on opinions from strangers on the internet, of which LFGSS is a great source.