Re: [RBW] Re: SS Coupler Military Bike stupid idea?

[Yuhan Wu]

Yeah, I think in the butted tubing case, the riding should dictate rather
than the folding/hiking. Thanks for the advice!

Jim M.  于2020年8月6日周四 下午1:31写道：

> I almost bought one of the BSA paratroop bikes at American Cyclery's
> garage sale one year. They may still have a couple. Cool but kinda wobbly,
> which may be from the hinge being old.
>
> I would think that if you have butted tubes, you'd want the coupler closer
> to the thickest part of the tube. But a real frame builder can probably
> answer that.
>
> jim m
> wc, ca
>
> On Thursday, August 6, 2020 at 8:53:35 AM UTC-7, Kainalu V. -Brooklyn NY
> wrote:
>>
>> I've only opinion to share, but I think it doesn't matter where you split
>> the frame, as the S couplers, when properly tightened, will add some
>> rigidity if anything. But that's only based off of what I've seen, not
>> experienced. Experienced coupler pros like Bilenky in Philadelphia would be
>> your best bet at an accurate assessment.
>> Enjoy that bike, wherever you decide to cut it in half!
>> -Kai
>
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Re: [RBW] Re: SS Coupler Military Bike stupid idea?

[Yuhan Wu]

Hi Benz, thanks for sharing your experience! I do travel a lot.
Internationally sometimes. So the couples make sense to me. I'm 145 pound.
Huqapillar is a little overkill already for most ridings except for some
really heavy load camping or grocery shopping. I shop tons of food during
the qurentine. It did amazing job carrying 50lbs goods. Sometimes I carry 3
big watermelons on the front rack. It still feels very stable with a 70cm
wide bar. Taking the racks off it feels like a fast gravel bike with dirt
drop and supple tires. Stiffness wise, I'm not sure if it will make too
much difference for me since it's already kind of overkilled. That's why I
only use 2.0 - 2.3 tires for hunq. Maybe I should ask rivendell for some
advice about the tube butting!

Benz Ouyang, Sunnyvale, CA  于2020年8月6日周四 下午4:13写道：

> On Wednesday, August 5, 2020 at 2:56:26 PM UTC-7, Yuhan Wu wrote:
>>
>> Hi guys, I've decided to add ss couplers to my hunqapiller finally.
>> Because I want a 29er I can easily fly with to mountains/parks or some
>> gravel races like dirty kanza. I was interested in the vintage military
>> bikes which has a hinge on the top and down tubes. These bikes could be
>> folded and carried with shoulder straps by the soldiers. Interestingly, the
>> idea is very similar to the modern couplers. But the vintage hinge locates
>> in the mid point of the top tube while modern coupler is closer to the
>> seatube. I heard one reason making it closer to seattube is for easier
>> boxing large frames. My bike is only 54cm. So that shouldn't be an issue.
>
>
> I don't know whether a hinged frame, even if it's a 54cm, will fit in a
> 26x26x10 box, because a normal S coupled bike isn't packed as if it's
> hinged at the couplers. Furthermore, if you're portaging your bike, I don't
> know if it needs to have the frame broken down, because AFAIK,
> superhuman Lael Wilcox doesn't ride a collapsible frame and she
> occasionally portages her bike (mostly through trails on her routes that do
> not allow cycling).
>
> I have a S coupled bike, but I have no idea if it's stiffer than a
> non-S twin, because it wasn't converted. However, I imagine a rather big
> chunk of thick-ish metal is probably stiffer than whatever tubing it
> replaced. This will be your case, because you're converting and probably
> won't/can't be redesigning the entire bike to accommodate the stiffer S
> coupled tubes.
>
> Finally, despite owning a S coupled bike, I'll recommend your
> reconsider/reevaluate. if you don't travel a lot, it may not be worthwhile
> to retrofit S couplers. Use bikeflights ,
> shipbikes  or something similar. These use
> larger boxes, and you'll spend less effort trying to disassemble/reassemble
> the bike at your destinations. Breaking down a S coupled bike is rather
> involved (30+mins per) because it all has to fit in a small box in a
> particular way. With the bicycle shippers, you can use larger boxes that
> will require less disassembly.
>
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