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PostPosted: Mon Nov 12, 2018 7:12 am 
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Joined: Sun Dec 05, 2010 2:59 pm
Posts: 835
Location: Southwestern Ontario
A typical car suspension has springs, so the body doesn't move with every bump in the road, and shock absorbers, to dissipate the energy stored in the springs. If the energy isn't dissipated, the body will bounce a lot after each bump. If energy pulses arrive at just the right (wrong) rate, the system could resonate and start bouncing wildly.

Those loops may be good springs, for storing energy, but they don't look good for dissipating that energy. Further reading says the composite material was designed by an archery bow maker. You don't want a bow to dissipate energy.


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PostPosted: Mon Nov 12, 2018 8:48 am 
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Joined: Fri Mar 02, 2018 4:44 am
Posts: 151
Location: France
AaronFW wrote:
Kade1301 wrote:
Or, of course, you could get the airless route - the reviews on a French shop's site are pretty good. The tyres are supposedly hard to mount, though, you'll want to buy the special tool needed for it at the same time as the tyres.


What French shop? :-?



https://www.acycles.fr/ville/pneumatiqu ... leins.html - just a place where I bought some stuff...

I will hopefully never know about Schwalbe Marathon in real wintry weather, because we should only ever get a bit of rain and maybe some slight frost (with a bit of luck not both together, in which case an emergency would be declared and people stayed at home).

Actually, the Smart Sam looks like it should make a decent tyre for snow. Btw, as you can see from the tread pattern, air pressure is extremely important with that model: When you are on the road and going straight the tyre is supposed to roll only on the central line of studs (anybody remember the old MTB tyres that had a continuous ridge in the middle of the tyre? Same principle here.) But if you can get studded tyres in your size, they might be well worth buying - when I lived in Munich I had some. However, I still had falls even with them...


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PostPosted: Wed Nov 14, 2018 5:50 am 
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Joined: Wed Aug 23, 2017 6:49 pm
Posts: 400
Location: Wooster, Ohio
Nanohedron wrote:
AaronFW wrote:
I am under the impression that they are no longer making them for bicycles but I can't find that clearly stated anywhere.

Oops - sorry. I suppose I could have looked deeper into it. But the idea's intriguing, and apparently it must be good enough to be used for wheelchairs. I wonder why they left off with the bicycle application...


That is alright. I was just curious enough to look deep. :) Though the tyres cost about $2000 a piece... I would probably just buy another flute instead.

It is weird. Their FAQ primarily talks about wheelchairs says that they've moved primarily to wheelchair tyres but also says "Sign up for our newsletter! We are still doing research on Mountain Bike Tyres!"


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PostPosted: Wed Nov 14, 2018 5:51 am 
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Joined: Wed Aug 23, 2017 6:49 pm
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Location: Wooster, Ohio
Kade1301 wrote:
AaronFW wrote:
Kade1301 wrote:
Or, of course, you could get the airless route - the reviews on a French shop's site are pretty good. The tyres are supposedly hard to mount, though, you'll want to buy the special tool needed for it at the same time as the tyres.


What French shop? :-?



https://www.acycles.fr/ville/pneumatiqu ... leins.html - just a place where I bought some stuff...

I will hopefully never know about Schwalbe Marathon in real wintry weather, because we should only ever get a bit of rain and maybe some slight frost (with a bit of luck not both together, in which case an emergency would be declared and people stayed at home).

Actually, the Smart Sam looks like it should make a decent tyre for snow. Btw, as you can see from the tread pattern, air pressure is extremely important with that model: When you are on the road and going straight the tyre is supposed to roll only on the central line of studs (anybody remember the old MTB tyres that had a continuous ridge in the middle of the tyre? Same principle here.) But if you can get studded tyres in your size, they might be well worth buying - when I lived in Munich I had some. However, I still had falls even with them...


Good to know.
We get a lot more snow here.


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PostPosted: Wed Nov 14, 2018 11:33 am 
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Joined: Fri Mar 02, 2018 4:44 am
Posts: 151
Location: France
Cycling in snow and on ice mostly sucks, there's no way around it. (Not that I like driving in those conditions....) But it's doable. Though I have no experience with a motorized bicycle in a real winter...


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PostPosted: Fri Nov 16, 2018 9:04 pm 
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Joined: Wed Oct 10, 2001 6:00 pm
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Location: East Coast US
I know I'm late to the show, but I've had great luck with Kevlar-belted tires. I got a bike in about 1986 in a somewhat more urban town than I grew up in (and that didn't have a bottle bill). I was getting a flat every few weeks, then I got Kevlar-belted tires. No flats for 30 years. I got a new bike a couple years ago (believe it or not, the technology had improved!). I got about three flats in the first few months, got Kevlar-belted tires, and no flats in over a year. These are road bikes with 25/23 mm wheels, so may not be closely related to your issue.

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Don't blame me, I voted for Cthulhu


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PostPosted: Sun Nov 18, 2018 1:23 am 
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Location: Wooster, Ohio
chas wrote:
I know I'm late to the show, but I've had great luck with Kevlar-belted tires. I got a bike in about 1986 in a somewhat more urban town than I grew up in (and that didn't have a bottle bill). I was getting a flat every few weeks, then I got Kevlar-belted tires. No flats for 30 years. I got a new bike a couple years ago (believe it or not, the technology had improved!). I got about three flats in the first few months, got Kevlar-belted tires, and no flats in over a year. These are road bikes with 25/23 mm wheels, so may not be closely related to your issue.


It is good to hear a good report on Kevlar-belted tires. My bike shop ended up recommending some for me and I think that is what I will go with.

Heres to 30 years without flats. :pint:


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