I’m loving it. Never seen that frame before, maybe from indonesia or something? Looks like it says Calvertex on the downtube, but I can tell the rider is quite short and the reach/wheelbase on that thing is also kids-bike sized.
On a separate note, I spoke with a machinist friend from CA who is getting set up for frame-building. He’s very excited to build me the the custom thing, and I think that is a better route than Marino at least for the first iteration.
I want them at 0.5x the water bottle spacing
M-Lok around the whole main triangle for maximum tacticool.
this bike is a pipe bomb ar-15 handguard
Is there a licensing fee I could pay for this? I’d just make the frame myself and sell my flatbar basket road bike.
$69
@arlew is about to get Fingers Crauced
@rancid_burple You should TOTALLY build one… er i mean two of these 
Seriously I’d love to work closely with someone to get the details all ironed out. Marino needs a fully-thought-out schematic, which I don’t feel I have, and my buddy who said he’d build me one has not yet built ANY bikes…
I don’t know that I’d be able to commit to a real “production” run of these things in any near future anyway, so it’s likely an idea destined for one- or two-off implementation
what details do you need for the schematic? we have several folckx here who have done this, I won’t volunteer anyone but this knowledge exists here
Mostly the minutiae around wheel/tire clearance in the front/rear, the implications of fat bike hub spacing and bb width with relation to chainline, that kind of thing.
I think i’ve got the basics figured out like bb height, reach, etc.
I probably couldn’t compete with Marino pricing but I could make one or two. If it means anything I have built 12 frames I think? Including two rather wacky prototype folding road bikes.
I draw my frames in rattlecad and have limited experience with real CAD software. I also don’t have any experience with small wheel bikes. I’m happy to help though!
@rancid_burple In your opinion does it still seem like the first step is getting a set of wheels/tires in my possession for measurement?
Re: spacing I think with 4” tires fatbike spacing and bb is necessary. With regular mtb spacing the chain would be touching the tire in some gears.
It wouldn’t hurt. Actual tire width and overall diameter could inform some decisions.
but here the chainstays are gonna be much longer than the wheel radius, and the tire isn’t in direct competition with the chainring for chainstay dent volume
really seems like an 83mm BB has a chance
Yeah maybe. Probably best to draw it up and figure out the chain angle across the cassette. My thinking was that with a 4” tire the side of the tire is roughly 50mm from center. 50mm happens to be typical 1x mtb chainline so if you’re going up to the larger cassette cogs the chain will likely contact the tire.
83mm BB = 55mm chainline I believe… so maybe that’s enough to get the necessary clearance.
Edit: maybe you could use a 83mm bb and direct mount rings with offset to get a wider chainline without going to mega Q factor fatbike cranks?
Flipped DM rings are probably what you want, check the Race Face chain line doc
Nice. Flipped raceface DM ring on a 83mm shell spindle length crank is 65mm chainline, which is fatbike territory.
Rear spacing would be the next question.
This is available as a pre-built wheel with 170mm QR spacing. Not sure if you’d be into thru axle, which would mean custom wheel builds. I could go either way
