travel tip & large sleeping bag

[revmaaatin]

Hello List Riding and internet companion Paul S. of Mn, MN and I have been having a discussion about optimum tire pressure = max performance from that 'strret' tire. It includes, what is the tire temp and air pressure rise that one would expect if you found the sweet spot. and the trade off's for best tire pressures to give optimum tire wear, especially in the middle of the tire. NOTE: I am seeing faster wear in the middle of this tire (as most of us do, reguardless of the tire brand or type; which is normal as we would be spending most of the tire's life riding in the middle of the tire rather than the edges. Perhaps with a little science thrown in, tire pressure can be adjusted to get longer tire wear in the midddle...and optimum performance in the canyons. Test Platform: I have a KLR outfitted with a spare wheel set; skinned to D607. = the holligan bike for old kids. smile. Today's Test data. I set out today with tire pressure set to 'list wisdom' of ~32/36 which acutally started/recorded as: 32.5psi front 35.5psi rear after a 60 mile ride, I note this tire pressure rise: 33.0psi front 39.5psi rear PSI both taken with a quality NAPA digital gauge. 55.4F OAT at the garage Road temp, unknown tire temp, unknown front tire warm to the touch Rear tire perceptively warmer than front; (sorry, don't have a lasar/infa-red temp gauge; yet!) Could rear tire temp could be slightly influenced by the exhaust? shrug. Anybody here have any 'science' rather than just 'opinion' about optimum rise in tire pressures as an indication that you have the tire pressure dialed in correctly? When ridden spirtedly, these D607 tires do not 'slip' or slide on the pavement nor do I exceed bank angle or drag toes or footpegs. However, if the K270's are ridden at the same rate/speed/psi, there is some interesting tire slide...without toe of foot peg drag. cough. Would love to see some reference material or 'rule of thumb' info for a starting point for dialing in the tire pressures for 'steet' tires if you have knowledge, wisdom, experience, etc. revmaaatin.

[mark ward]

I use a basic T-handle razor, and store the blade head in a toothbrush case, so not to damage/bend DULL, the blades. you can get one that only covers the head of the brush, not the brush handle, 1 blade fits nicely. I also use one for my tooth-brush, a regular case that you put the whole brush into take up alot of space. I have Broad shoulders, untill I found "Big Agnes" brand "Park" series I could not zip one closed, without having to hold my arms close, then they still unzipped at night when I moved. They also have "wedgies" for there bags (& yours?) that create a larger bag. (7inchs MORE at top.) just zips into place. Test and RE-test before a trip is GOOD ADVICE. It didn't help last Jan. in Death valley, at 30dig., that I accidently grabbed my grandsons, standard size, summer bag, and couldn't zip my arms inside. Similar color & patern as my new one.) [Non-text portions of this message have been removed]

[Todd Vosper]

Rev, I talked to a tire manufacturer once trying to get some good info for an upcoming track day. For non-race tires, the rule of thumb was a 10% increase in PSI. Now, he was quick to caveat with the fact that different tires and different personal preferences may alter the final choice, but probably a good starting point.

>Anybody here have any 'science' rather than just 'opinion' about optimum rise in tire pressures as an indication that you have the tire pressure dialed in correctly?

[Chris]

I've been using the 10% rule for tire pressure increase with my TKC-80's. It's worked well. Fully loaded, at highway speeds, I use 28psi front, 37psi rear. I lower that for off-highway and off-pavement. Never below 15/15, more often 20/25 is the minimum. Regards, Chris

On Mon, Nov 19, 2012 at 10:18 AM, Todd Vosper wrote: > ** > > > Rev, > > I talked to a tire manufacturer once trying to get some good info for an > upcoming track day. For non-race tires, the rule of thumb was a 10% > increase in PSI. Now, he was quick to caveat with the fact that different > tires and different personal preferences may alter the final choice, but > probably a good starting point. > > > >Anybody here have any 'science' rather than just 'opinion' about optimum > rise in tire pressures as an indication that you have the tire pressure > dialed in correctly? > > > [Non-text portions of this message have been removed]

[revmaaatin]

Hi Todd. 10% has been a rule of thumb I also have heard for years, yet, have not seen any science to support that suggestion. shrug. Maybe, it has been around for so long that it is now science? smile. I was left to wonder if 10% was something I imagined or if 'racers' actually used that number. A 'friend' over in the Twin Cities suggested that a Metzler tire rep said max performance/maximum tire life occurs at 'max' pressure as stated on the side wall. hmmmm. I report, you decide. I heard this NASCAR conversation on SPEED channel, "They will add 0.5lbs of pressure to just one tire", I really began to think about optimum tire pressures for my HP challenged pig--which I love dearly; it of course deserves every stoke of genius othat our racing heritage can add. In another vein, I have lowered my K270 tire pressure to 17-18psi [cold] while riding the South Dakota Black Hills fire trails and have loved the performance, especially while riding through broken rock trails and softball boulders of dry creek beds. As a side note, I don't see a huge difference in the asphalt portion with lowered tire performance while riding at the posted limits. cough. If it is going to be a paved-day rather than a trail day, the tire pressure remains at 32F/36R. I am going to monitor the tire pressures and see if there is a 10% rise; adjusting accordingly. revmaaatin.

--- In DSN_KLR650@yahoogroups.com, Todd Vosper wrote: > > Rev, > > I talked to a tire manufacturer once trying to get some good info for an upcoming track day. For non-race tires, the rule of thumb was a 10% increase in PSI. Now, he was quick to caveat with the fact that different tires and different personal preferences may alter the final choice, but probably a good starting point. > > >Anybody here have any 'science' rather than just 'opinion' about optimum rise in tire pressures as an indication that you have the tire pressure dialed in correctly? >