tire pressure

[Igorski]

hardtail rigid 300 Avon rear tire recommended pressure is 42 at 1234 lbs {i am starting at 38 } front tire 80-90-21 has recommendation of 42 at 397 lbs {i am starting at 34} bike weighs 660 lbs , me 150 , gear 60 , so total 870 lbs , what do you guys think i should run front and rear pressures at ?

 

[Mikeinjersey]

hardtail rigid 300 Avon rear tire recommended pressure is 42 at 1234 lbs {i am starting at 38 } front tire 80-90-21 has recommendation of 42 at 397 lbs {i am starting at 34} bike weighs 660 lbs , me 150 , gear 60 , so total 870 lbs , what do you guys think i should run front and rear pressures at ?

Welcome from NJ,
I have a K9 soft tail and run at 40 lbs with no unusual wear or handling issues. Someone on this site will know how low you can go and still be safe. Hard tails are cool not comfortable

 

[Jersey James]

I always use what ever psi the manufacturer recommends, in my ridgid bikes. Tires are to dam expensive to have wear out premature, due to under inflation. Your tires, your choice.

 

[Igorski]

I ran at 42 front and rear several years ago , hit a bridge approach on the interstate at 65 mph , a guy following me later said he could see air under the whole bike , i did'nt get bucked but it was concerning.

 

[Jwooky]

If you run them low, they are slightly more compliant, but will wear and harden faster.

I recall a fact of they run about 10 deg hotter per PSI below 40.

This will heat cycle them faster and harden the tread.

 

[SCC007]

Follow the inflation specs from the manufacturer. If it says 42 I would keep it at that, they do a lot of testing on how they perform with a whole lot of variables (speed, weight, temp, etc).

 

[wmitchell248]

hardtail rigid 300 Avon rear tire recommended pressure is 42 at 1234 lbs {i am starting at 38 } front tire 80-90-21 has recommendation of 42 at 397 lbs {i am starting at 34} bike weighs 660 lbs , me 150 , gear 60 , so total 870 lbs , what do you guys think i should run front and rear pressures at ?

I have a Ridgeback with a 300 on the rear, rigid of course. I run 18# on rear and 32# on front...I'm 6'1" 270#

 

[Jwooky]

Destroying that tire

 

[Mickmorris]

Yeah 18 is really low. That must bottom to the rim when you hit a bump on that rigid.

 

[Mickmorris]

hardtail rigid 300 Avon rear tire recommended pressure is 42 at 1234 lbs {i am starting at 38 } front tire 80-90-21 has recommendation of 42 at 397 lbs {i am starting at 34} bike weighs 660 lbs , me 150 , gear 60 , so total 870 lbs , what do you guys think i should run front and rear pressures at ?

Recommended pressure is best.

 

[Jersey Big Mike]

If you run them low, they are slightly more compliant, but will wear and harden faster.

I recall a fact of they run about 10 deg hotter per PSI below 40.

This will heat cycle them faster and harden the tread.

If you want to monitor you tire pressure and temperature you can use these guys

https://www.amazon.com/WISTEK-Bluetooth-Pressure-Monitoring-Motorcycles/dp/B09D8S36XD/ref=sr_1_2?crid=OXIBUFI5YTUT&keywords=wistek&qid=1656643343&s=industrial&sprefix=wistek%2Cindustrial%2C79&sr=1-2

App that come with (dl doesn't work) but I have found another app for android that works just fine and I am building a module that will display on the handlebars the PSI/temp etc without using the cell phone, based on an online article.

 

[francoblay1]

I have a Ridgeback with a 300 on the rear, rigid of course. I run 18# on rear and 32# on front...I'm 6'1" 270#

It must be a typo.....

 

[dtmmil]

That skinny little front I would run 40-42, rear you can run a little lower, watch air pressure, set it, go for a ride and check it hot, see how much it gains, shoot for 2-3psi gain.

 

[BBChopper]

40, 40, 40

 

[BryanPratt]

 

[pknowles]

You would think the manufacturer's recommended tire pressure would take into account the anticipated heat build up.