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AA
human power expert

USA
2373 Posts
Posted - 08/07/2012 :  18:17:08  Show Profile  Reply with Quote
I am posting this photo to let people know that the sidewalls on Ultremo 406 tires are NOT very durable compared to the older Stelvios and Dahon folders

This tire had less than a month of mileages. It was inflated at 150 psi. The blow out happened at the bottom of a hill with max speed above 30 mph. Definitely my worst crash since riding recumbents. No longer going to ride recumbents after this one as I broke body parts on impact.

Good luck if you ever hear a loud bang when you are riding at max speed with a 406 Ultremo ZX front tire.

alevand
human power supergeek

USA
1646 Posts
Posted - 08/07/2012 :  18:26:06  Show Profile  Visit alevand's Homepage  Reply with Quote
Sorry to hear that, Alan. I had a Stelvio blow out on me at the WISIL race at 30 mph, my fault for using a dollar bill to repair a side wall gash a few months prior. You could see by body outline in scraped into the coroplast. Good luck on your recovery.

C:
Tony Levand
Edited by - alevand on 08/07/2012 18:33:29
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Speedbiker
human power supergeek

USA
1995 Posts
Posted - 08/07/2012 :  19:17:37  Show Profile  Reply with Quote
Damn sorry to hear that, Alan. Not surprised about those tires. My superlight, race only Stelvio failed after two rides. If you want supple, you get a paper thin sidewall.

Sell all your toys and buy a fast velomobile!
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alevand
human power supergeek

USA
1646 Posts
Posted - 08/08/2012 :  11:08:42  Show Profile  Visit alevand's Homepage  Reply with Quote
I had a tire blow out when the brake pad got out of position and rubbed on the side wall. It blew when I braked from high speed.

C:
Tony Levand
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Zyzio
recumbent enthusiast

USA
120 Posts
Posted - 08/08/2012 :  12:27:00  Show Profile  Reply with Quote
Best wishes for a speedy recovery Alan!

What is the "official" max. pressure rating on those tires?

How did your NoCom survive the crash? I noticed you briefly had it posted for sale. Are you still selling it?

PeterB
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Runxner
recumbent enthusiast

Australia
327 Posts
Posted - 08/08/2012 :  15:15:49  Show Profile  Reply with Quote
Sounds like a horrific crash. I was considering Schwalbe Ultremo R.1 Evolutions for my roadie. Now reconsidering.

Another predicative review http://road.cc/content/review/54936-schwalbe-ultremo-zx-tyre
Either side of that, in contrast, the tyre is pretty vulnerable, so if you're unlucky enough to hit something jagged while you're cornering, you might well be in for a bit or roadside tube changing. The sidewalls are very skinny too, so if anything flicks up there's a fairly good chance of it getting through... but that's the price you pay for the low weight.
Verdict
Fast, lightweight tyres with good grip and puncture protection, but save them for competition use

Team Low-Life
Lowracer Test Pilot/Evangelist
Adelaide, Australia
Edited by - Runxner on 08/08/2012 15:16:21
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Dreamer
recumbent guru

USA
541 Posts
Posted - 08/08/2012 :  21:32:36  Show Profile  Reply with Quote
quote:
What is the "official" max. pressure rating on those tires?

Schwalbe's web site lists 160 psi for both the 406 and 451 size Ultremo Zx tires.
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Larry Lem
human power supergeek

South Sandwich Islands
1971 Posts
Posted - 08/08/2012 :  22:18:34  Show Profile  Reply with Quote
says 85-160 psi on the sidewall of a 406 Ultremo


Larry Lem
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warren
human power expert

4229 Posts
Posted - 08/09/2012 :  06:25:51  Show Profile  Visit warren's Homepage  Reply with Quote
I think the 160 is for a smooth surface like a velodrome. I personally would not run more than 120 lbs on the street. Both LZ and AA had blowouts with this tire when hitting sharp transitions (railroad track, uneven 3/4" concrete lip) at moderate speeds when the tires were at 150 PSI.
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Upright Mike
human power expert

USA
3006 Posts
Posted - 08/09/2012 :  06:39:56  Show Profile  Visit Upright Mike's Homepage  Reply with Quote
Alan, thanks for posting this. I have recently noticed torn sidewall threads on my 406 Durano from chain rub after many miles of use. When John owned the bike, this tire was on it, then I've put over 2000 miles on it. Needless to say the Durano is a durable tire having been ridden hard on the street over all kinds of potholes and gravel all this time. I inflate it to 120 psi. In this past week, I bought both a Durano for $57 and an Ultremo ZX tire for $76 from HostelShoppe, but your posting, Thom's experience and others experiences is causing me to be very hestinant about putting that new UltremoZX on. I will put on the new Durano for the big race coming up in Celina. I don't think a lowracer application with a chain that can rub the front tire is the best place for an lightweight thin sidewall tire.
I hope you have a speedy recovery. Don't sell anything. Get back on the saddle soon.
Edited by - Upright Mike on 08/09/2012 06:43:22
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Speedbiker
human power supergeek

USA
1995 Posts
Posted - 08/09/2012 :  06:47:17  Show Profile  Reply with Quote
I keep meaning to apply some Shoe Goo to a sidewall to see if it protects it. Having used it in shoe soles, I am pretty sure it will. Too busy to try it right now.
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Larry Lem
human power supergeek

South Sandwich Islands
1971 Posts
Posted - 08/09/2012 :  09:07:55  Show Profile  Reply with Quote
Ultremos in 406 are so tiny, I would never run them in training. Racing only. On good roads.

I would like to eventually get away from 406s altogether. They are incredibly slow compared to big wheels. That is why I keep wondering how fast a NoCom could go if it were designed for a 650C front.

It will likely take someone like John M to build a very laid back dual 650C lightweight, stiff bike. (I think the rider should lay back a bit more than they do on the NoCom or M1 for TTs.) My unborn twin would be doing this as I don't have time, fully immersed in streamliners.

Larry Lem
Edited by - Larry Lem on 08/09/2012 09:08:33
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warren
human power expert

4229 Posts
Posted - 08/09/2012 :  12:29:17  Show Profile  Visit warren's Homepage  Reply with Quote
I can see Larry now, arms fully immersed in a massive vat of bondo.
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alevand
human power supergeek

USA
1646 Posts
Posted - 08/09/2012 :  16:28:20  Show Profile  Visit alevand's Homepage  Reply with Quote
Flanked by piles of sanding dust as he carves out his greatest creation to date...

quote:
Originally posted by warren

I can see Larry now, arms fully immersed in a massive vat of bondo.


C:
Tony Levand
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PUGZCAT
recumbent enthusiast

Canada
240 Posts
Posted - 08/10/2012 :  03:01:00  Show Profile  Reply with Quote
I dodged the blowout bullet a couple of years ago. I was going down the hill to the beach on my long wheelbase low cruiser ,that descends like a falling anvil, likely 30 mph plus. I got to the boardwalk going walking speed and side wall blows out. The cotton patch sidewall I had sewn inside let go.
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Ben Goodall from Tri-Sled
Starting Member

Australia
48 Posts
Posted - 08/10/2012 :  21:14:25  Show Profile  Visit Ben Goodall from Tri-Sled's Homepage  Reply with Quote
I've had one grow a bump and managed to stop before a blow out. I'm now testing around 6 of them and picking the best for my BM bike
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Speedbiker
human power supergeek

USA
1995 Posts
Posted - 08/11/2012 :  07:21:22  Show Profile  Reply with Quote
Ben, I am sure you know to be sure to not let anything touch it as it spins. Not always easy in a tight streamliner.
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AA
human power expert

USA
2373 Posts
Posted - 08/12/2012 :  11:23:36  Show Profile  Reply with Quote
quote:
Originally posted by Zyzio



How did your NoCom survive the crash? I noticed you briefly had it posted for sale. Are you still selling it?

PeterB


Peter,
Only offers I had for the bike were from spammers trying to get my SS# and PayPal account info. I pulled the ad, got out the sawzill.

Still have a Cruzbike Vendetta and MataBike framekit for sale. By October I will no longer own any recumbent related items.
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Upright Dave
Starting Member

USA
44 Posts
Posted - 08/13/2012 :  12:02:26  Show Profile  Reply with Quote
quote:
Originally posted by AA
[ No longer going to ride recumbents after this one as I broke body parts on impact.


Sorry to hear this. Which body parts did you break?
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AA
human power expert

USA
2373 Posts
Posted - 08/13/2012 :  13:16:17  Show Profile  Reply with Quote
Titanium and ceramic parts installed in the knee 5 yrs ago.

Game Over.

quote:
Originally posted by Upright Dave

quote:
Originally posted by AA
[ No longer going to ride recumbents after this one as I broke body parts on impact.


Sorry to hear this. Which body parts did you break?
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delcrossv
recumbent enthusiast

Vanuatu
245 Posts
Posted - 08/13/2012 :  13:42:15  Show Profile  Reply with Quote
Sorry to hear about your crash AA.
Edited by - delcrossv on 08/13/2012 13:54:56
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msol
Starting Member

Italy
13 Posts
Posted - 08/14/2012 :  03:25:58  Show Profile  Reply with Quote
AA too bad the knee stuff, been following your rides since razzfazz days
hope your builder skills and interesting learning curve not going lost as well
fwiw a guy in germany has made an evo-r vm hand - pedalled
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alevand
human power supergeek

USA
1646 Posts
Posted - 08/14/2012 :  05:03:34  Show Profile  Visit alevand's Homepage  Reply with Quote
I thought you were still recovering from surgery, wasn't it just six months ago? I was reading that the life span for replacement is 10 years. Do you have a full or partial? How did it break, over extension or was it impact stress. I read that most failures are bonding. What is your prognosis?



C:
Tony Levand
Edited by - alevand on 08/14/2012 05:06:27
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harv
recumbent enthusiast

317 Posts
Posted - 08/14/2012 :  05:45:37  Show Profile  Reply with Quote
Has your lawyer contacted Schwalbe yet?
Edited by - harv on 08/14/2012 05:52:36
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AA
human power expert

USA
2373 Posts
Posted - 08/14/2012 :  08:43:43  Show Profile  Reply with Quote
quote:
Originally posted by harv

Has your lawyer contacted Schwalbe yet?


Harv,
i contacted Schwalbe. The chance of any legal action is slim to none. It is what it is and will take 6-9 months to recover.

Continued impact on the partial will require a total. Partial components including the tibial and femoral surfaces degrade from impact. Kind of a no brainer to give up on go fast bikes when this procedure is next should another crash occur.
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Speedbiker
human power supergeek

USA
1995 Posts
Posted - 08/14/2012 :  14:08:09  Show Profile  Reply with Quote
It is doubtful that a blowout caused by the chain wearing through the sidewall is covered. The wear line is apparent in the first post photo. I try to inspect mine regularly, but those darn semi truck tire Duranos on my other bike spoiled me.
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