Yes, I know it’s a component with very small demand, but it does not hurt to ask. Does anyone know if 56mm straight headtubes are available somewhere?
Why a big “can” like that? Simple. The use of 56mm headtubes enables the use of headsets that allow for +/-5mm reach adjustment. Even though most handmade frames are made-to-measure types of affairs, in some cases the extra adjustability would not hurt.
Thanks! For heavy-duty use, all the way up to enduro or even downhill riding. Durability and strength over weight for sure. 125mm length would be a nice middle-of-the-road type of size.
While at it, I just realized that sourcing a reamer for this headtube might be just or even more difficult than the headtubes themselves.
I’m messing around with the idea of building a 56mm HT at the moment. My use case is a bit strange (1.8 steerer e-bike fork, I’ll be doing ZS56 and IS 60 lol).
But along the way, in my research, it seems like for better or worse, internally routed headsets are a thing. Also reach adjust as stated by the OP, and more angle adjust options could open up. 56mm head tubes aren’t pretty, or light, but for an even more flexible option, it could be cool. How many would use them, I don’t know, but it seems like steel full suspension have taken off in the past few years!
Interestingly, I learned a short while ago that some factory-made full-suspension frames (and EMTB’s as well) use a 56mm headtube for increased welding surface area for connecting the downtube and toptube. This does not really matter when working with steel and small-diameter tubes, but interesting tidbit nevertheless, I think.
We made some 56mm headtubes for the Works Components headsets when I was prototyping the RocketMAX Gen4. I then went on to put them on the first steel version of Neko’s Frameworks steel frames. I don’t know how helpful this will be as it’s a UK standard, but we sourced 60.3mm OD x 5mm wall T45 tubing from Proformance Metals. We with turned the tubes to 56mm standard with 2mm wall.
That’s an interesting point, and I understand what you mean. I haven’t come across many 56mm straight headtubes lately, but it might be worth checking with smaller frame builders or custom shops since they sometimes keep uncommon sizes like stainless steel tubes. You could also contact headset manufacturers or Works Components directly, as they might point you to a supplier or consider a custom option. Having that extra reach adjustment can really help with fine-tuning the fit.
56mm Straight? We have it in Reynolds. Also a 56mm Doubke Butted DT for e-bikes. Drop me a message’s. We also have Top and Bottom internal reinforcement rings for IS52 bearings.
