bike deaths

[Hal]

I was told by a very experienced mechanic that using heavy duty tubes when riding on the freeway a lot will generate high heat compared to normal tubes and increases the chances of failure of the tube. He did not recommend for freeway use for this reason. And he would have made more money selling them too, since they are a lot more expensive. Any thoughts here? I ride 80/20 highway, dirt and pocked-mark roads. Halbiz

--- In DSN_KLR650@yahoogroups.com, Jeff Khoury wrote: > > In my professional life, some of my favorites are wonky and cattywompus. > > - > Jeff Khoury > > > On Aug 14, 2009, at 7:10 AM, Jeff Saline wrote: > > > On Fri, 14 Aug 2009 13:54:44 -0000 "David Giuliani" > > writes: > > > Another question and a little clarification: > > > > > > When I "balanced" the wheel/tire on a pair of jack stands, it kept > > > landing at the same point until I worked up to 2 oz. of 1/4 oz. > > > weights lined up along one side between the spokes. I've never had > > > to place that many before. Could it be do to the newly installed > > > extra heavy duty tube? Has anyone experienced this? > > > > > > > > > I'm wondering what sort of pressure you guys run in the TKC80. I'd > > > like to keep an average for road, gravel, and dirt use but don't > > > want to sacrifice road-ability for my 15% trail use. And I don't > > > want to sacrifice wear either. My weight plus minor gear usually > > > doesn't go over 220lbs. > > > > > > Dave > > <><><><><><><><><> > > <><><><><><><><><> > > > > Dave, > > > > I've had to add lots of weight when using a heavy or ultra heavy duty > > tube too. I did find/feel a large piece of material inside a tube > > which > > I think was from installing the valve at manufacture. It made the > > balancing pretty whacky*. You could try rotating the tire 90 to 180 > > degrees to see if that makes any difference but I don't think it will. > > My suggestion is to just ride it once it's balanced. > > > > I run Kenda K270s at 32 psi front and 36 psi rear for most of my > > riding. > > I normally don't change pressures for off pavement riding. I think the > > TKC80s are a similar tread and might work about the same. I'm a bit > > lighter than you fully loaded. > > > > * Whacky is a technical term only for use by trained professionals and > > often misused by other than trained professionals. : ) > > > > Best, > > > > Jeff Saline > > ABC # 4412 South Dakota Airmarshal > > Airheads Beemer Club www.airheads.org > > The Beautiful Black Hills of South Dakota > > 75 R90/6, 03 KLR650, 79 R100RT > > > > . > > __________________________________________________________ > > You can take it with you! Click here for a luxurious new motor home > > and travel in style! > > http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTD0ffnN0iMBzLVOxYSfLDrQawKgdaNapDbsbbF8htPp803slf4Bo8/ > > > > > [Non-text portions of this message have been removed] >

[Tumu Rock]

--- In DSN_KLR650@yahoogroups.com, "Hal" wrote:

> > > I was told by a very experienced mechanic that using heavy duty tubes when riding on the freeway a lot will generate high heat compared to normal tubes and increases the chances of failure of the tube. He did not recommend for freeway use for this reason. And he would have made more money selling them too, since they are a lot more expensive. > > Any thoughts here? I ride 80/20 highway, dirt and pocked-mark roads. > > Halbiz >

I've been running HD tubes since about 2000 and usually they outlast two sets of tires, though I might change them at that point and keep the old ones in the tube pack as spares. da Vermonster

[Jeff Saline]

On Fri, 14 Aug 2009 16:54:48 -0000 "Hal" writes:

> > I was told by a very experienced mechanic that using heavy duty > tubes when riding on the freeway a lot will generate high heat > compared to normal tubes and increases the chances of failure of the > tube. He did not recommend for freeway use for this reason. And he > would have made more money selling them too, since they are a lot > more expensive. > > Any thoughts here? I ride 80/20 highway, dirt and pocked-mark > roads. > > Halbiz

<><><><><><><><> <><><><><><><><> Halbiz, I've heard that too but not found it true in my case. I've ridden over 500 miles in high 90s and low 100s at 60-65 mph with out issue. I've had the same ultra heavy duty tube in my rear for well over 20,000 smiles. It's still looked good at the last tire change. The front tube got changed out after the "incident" when I did the superman slide and somehow the front axle got bent as did one front spoke and the valve stem. I rode with the bent valve stem for well over 2,000 more miles and still have the bent spoke. I thought since I had a new front tube available I should change it when I next changed the front tire. I'd use the tube with a bent valve if needed and nothing better was available. Steve did have a patch come apart on De Tour in 2006 while riding in AZ, nasty hot that day. The day before we'd been riding for about 3 hours at 55-65 mph straight up, triple digit temps. The repair had been made a week earlier and the glue used was suspect. The tube failed the first time leaving the Hole in the Wall in Wyoming as Steve decided to pick up a screw from a freshly graded road. We were about 3 miles from his brother in laws ranch in AZ when the patch let go a week later. We pinched his spare tube and then used mine. A guy who could barely speak English stopped by after about 30 minutes and gave each of us an ice cold soda. Man was that a nice gesture. A few days later I cleaned the old patch and glue off the tube and repatched it with known fresh glue. Steve took it home as a spare. I don't think the heavy duty or ultra heavy duty tubes are really needed for around home riding. But when you are on a mostly dirt trip of a few weeks it sure is nice to know you have a pretty hefty air bag. If a guy rides with lower tire pressures it might also be helpful in preventing pinch flats. Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650, 79 R100RT . ____________________________________________________________ Self-Employed? Need a Health Plan? Click here to get self-employed health insurance. http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTFMQtMGKH5cg5qO8cEZzJWzTRlrL0r9hSdUGBWVXw0KsdXjutJ6dK/

[roncriswell@sbcglobal.net]

Listers there have been a rash of bike crashes and deaths around here lately. The latest, a long time DUI driver and drug abuser ran over a guy if I read it right at 10:29 AM. I survived the same sort of crash years ago getting hit in the rear by a drunk ....... at 11'00 PM. The lady that killed the guy is going away a long time over this one. The guy only had the bike for 4 or 5 days. Be careful out there. Criswell

[Tengai Mark Van Horn]

At 4:54 PM +0000 8/14/09, Hal wrote:

>I was told by a very experienced mechanic that using heavy duty >tubes when riding on the freeway a lot will generate high heat >compared to normal tubes and increases the chances of failure of the >tube....

And some very experienced mechanics say that fork braces are bad because they add "unsprung weight" to the front end. If anyone wants to do a controlled study on temperature differences of an HD tube vs a standard tube over 100 miles of hot slab, that's fine with me. I have never seen a documented story of a tire failure related to an HD tube, so I continue to run Bridgestone Ultra HD in my bikes. No tire problems in over 75,000 miles of experience with them. Mark

[Norman Moore]

Mark, Very encouraging after seeing my standard tube torn up by a nail and unfixable. When I change tires again, I'm putting in HD tubes. ________________________________ From: Tengai Mark Van Horn To: Hal Cc: DSN_KLR650@yahoogroups.com Sent: Saturday, August 15, 2009 6:02:13 AM Subject: Re: [DSN_KLR650] Re: tire upgrade question on heavy tubes At 4:54 PM +0000 8/14/09, Hal wrote:

>I was told by a very experienced mechanic that using heavy duty >tubes when riding on the freeway a lot will generate high heat >compared to normal tubes and increases the chances of failure of the >tube....

And some very experienced mechanics say that fork braces are bad because they add "unsprung weight" to the front end. If anyone wants to do a controlled study on temperature differences of an HD tube vs a standard tube over 100 miles of hot slab, that's fine with me. I have never seen a documented story of a tire failure related to an HD tube, so I continue to run Bridgestone Ultra HD in my bikes. No tire problems in over 75,000 miles of experience with them. Mark [Non-text portions of this message have been removed]