Kumho rear tire air pressure?

[JP58]

The people that have the kumho ecsta 225/50r/15. I will be installing Saturday. What air pressure should I use.

 

[ssmcclub]

air presser

The people that have the kumho ecsta 225/50r/15. I will be installing Saturday. What air pressure should I use.

28psi works for me

 

[Bob Denman]

23 psi here...
The stiffer sidewall of the car tire just didn't need as much pressure.

 

[PW2013STL]

I have been running 25# in my current car tire (Michelin Premier A/S) and at 23,000+ miles the center has less tread then the sides. My new tire will be run at 22#.

As Bob just stated (and Mike and Peter have been telling us all) We are lighter than a car and need to lower the pressure to get the max out of these tires.

 

[BLUEKNIGHT911]

SPYDER - IF YOU HAVE CAR TIRES PSI

:yes: I'm the Mike ( of Mike and Peter ) and if you are using a car tire ( any brand ) you will be safer and enjoy the ride better if you lower the REAR psi to .. 18 ( cold ) .. I'm sure Peter will agree with this :clap:. I know this may seem too low, but remember that tire will increase at least 3 psi after about 3 miles of driving ....... Mike :thumbup:

 

[BLUEKNIGHT911]

TIRE PRESSURES

I have been running 25# in my current car tire (Michelin Premier A/S) and at 23,000+ miles the center has less tread then the sides. My new tire will be run at 22#.

As Bob just stated (and Mike and Peter have been telling us all) We are lighter than a car and need to lower the pressure to get the max out of these tires.

PW, I've been running my Michelin Hydro-edge in the 18-20 range for 20,000 + miles and my wear is even across the tread..... The fact that it has 4 tread plies ( one is steel ) helps it to run flat ....... Mike :thumbup:

 

[Fatcycledaddy]

PW, I've been running my Michelin Hydro-edge in the 18-20 range for 20,000 + miles and my wear is even across the tread..... The fact that it has 4 tread plies ( one is steel ) helps it to run flat ....... Mike :thumbup:

Mike, I am going to be running 2 up, all bags fully loaded and a trailer tongue weight of about 40#, I have the Genreral AltiMAX-rt43 on the rear, and federal Formoza on the front.
Should I increase the rear air pressure slightly from the 18# range, and what is your opinion of the front tire pressure?

Thanks.

 

[Bob Denman]

If it was me: I'd go up about 3 psi. :thumbup:
(But that's me. )

 

[AeroPilot]

Kumho currently at 25.6 psi at 80 F according to my FOBO

On my 15 base RT riding one up 95% of the time..12,500 miles, wearing even and half the tread left.

 

[BLUEKNIGHT911]

AND MY ANSWER IS !!!!!

Mike, I am going to be running 2 up, all bags fully loaded and a trailer tongue weight of about 40#, I have the Genreral AltiMAX-rt43 on the rear, and federal Formoza on the front.
Should I increase the rear air pressure slightly from the 18# range, and what is your opinion of the front tire pressure?

Thanks.

I'm in the mood to type so ...... your Altimax has a max load rating of approx. 1450 lbs., your load ( for the rear tire ) will be 750 lb +/- ...remember the tire will heat up quickly and raise the psi 3-5 lbs. sooooooo although I think 18lbs is OK 20lbs will be OK also ......and it will make you feel better :clap::clap:and that's a good thing .......... on the front 16lbs would be fine, you have two tires and the weight shift is to the rear............. enjoy your trip....... Mike :thumbup:

 

[oldgoat]

I started to run at 21psi but have now lowered it to 19psi. I find it very comfortable along with my Elka rear shock.

 

[Peteoz]

Following Mike and Peter's guidelines, I started at 24 in the rear and 22 in the front of my Kuhmos. I have let that drop to 20 rear and 18 front which feels pretty good to me, as a 300+lb (without riding gear......I know, I know.....not an image anyone needed :yikes: ) rider. :thumbup:

Pete

 

[IGETAROUND]

tire pressures

15#' all around, with and without my timeout trailer :thumbup:hyea::clap::yes:

 

[Richardv]

21 psi for us....

The people that have the kumho ecsta 225/50r/15. I will be installing Saturday. What air pressure should I use.

We have 3 AST 225. Look at my signature for the details.Running 21 in the rear for all of our bikes....and 15 in the front Kumho KH16 175/55.... good traction, even wear, NO VIBRATION...(a la Kenda!!! ) and excellent control in the wet.

While Going to the Home coming event, at the beginning of the month, I was stuck in a groove full of water on champlain bridge in Montreal. We were going about 35 - 40 mph.... I side slipped to a real 90 degrees.... and the rear AST succeded to get the grip back and brought me back in straight line...... no Kenda would have done that....!!!! I am a firm believer of the "plus value" of a good "car" tire...

 

[Peter Aawen]

I'm in the mood to type so ...... your Altimax has a max load rating of approx. 1450 lbs., your load ( for the rear tire ) will be 750 lb +/- ...remember the tire will heat up quickly and raise the psi 3-5 lbs. sooooooo although I think 18lbs is OK 20lbs will be OK also ......and it will make you feel better :clap::clap:and that's a good thing .......... on the front 16lbs would be fine, you have two tires and the weight shift is to the rear............. enjoy your trip....... Mike :thumbup:

:agree: ^^ Mike's covered it pretty well there & in his previous posts, except I'd add the caveat that IF you are riding in really hot weather (90+ F) &/or fully loaded/for long distances (ie, from tank full to empty) in really hot weather/on hot road surfaces, then it might pay you to up your rear tire pressure just a tad (max 2 psi maybe!) moving a touch towards the 20-22lbs side of things, just to avoid overheating the tire & prematurely wearing the tread centre due to the 'abnormal heat' some of North America is currently experiencing without further compromising ride & traction (your front tires shouldn't need this extra pressure, they aren't working hard enough anyway!) The hotter ambient temps & road surfaces will cause the tire to heat up a little more than usual & a tad quicker, & that increases the pressure inside them proportionally more than the ideal 3-5 psi increase... adding up to a couple of extra lbs cold before you start out will reduce the overall proportional pressure increase & the subsequent 'ballooning' of the tire, which will increase tire wear needlessly as well as compromise traction! :lecturef_smilie:

But generally, with car tires fitted that are capable of so much more than carrying your relatively lightweight Spyder, then given the general range of sizes in riders/loading out there, you'll probably want to be running about 14-18psi up front & 16-20psi in the rear, and adjust those cold start pressures to achieve that 3-5 psi increase after ryding for a while (30-60 mins is enough - check out 'the 4psi rule') Basically, less increase means your cold start pressure was too high, so you are compromising the optimum traction, ride, & wear your tire could provide for you in favour of only slightly more direct handling/steering response; more increase means you are compromising the optimum ride, wear, & handling/steering response from your tires in favour of greater traction. :thumbup:

Running your ideal pressures & the optimum pressures in whatever tires you have fitted rather than sticking with the 'one size fits most' compromise pressures for the Kendas as shown on the tire placard can make your Spyder sooo much more comfortable to ryde, & more responsive, & safer, & less costly, & less likely to hydroplane in the wet, & .....

 

[Allensr]

with every body happy

Wow it really seems to not matter from 18 to 23. Every one is ok with the pressure they are running and great life, and even wear. So how critical is it really?
I just put a Kumo on my 2014 StS and have been using a IR thermometer to check tempt across the tire, the position of the sun is the largest influence and that is never more than 3 deg. I'm running 22 lbs. Time will tell
Allen

 

[SpyderAnn01]

I have always run 28 in my rear tires and I find that if I lower it much I feel like I'm driving a truck. I've got to change out all 3 tires on my bike when it gets out of the shop so maybe I'll give 23 a try for the rear. I'll try most anything once.

 

[Bob Denman]

Question: How much does the air pressure in the tire affect it's ability to remain seated on the bead of the wheel? :dontknow:
(Is there a point where too little pressure might become dangerous?)

 

[Fatcycledaddy]

Question: How much does the air pressure in the tire affect it's ability to remain seated on the bead of the wheel? :dontknow:
(Is there a point where too little pressure might become dangerous?)

Hmmmm... I can see where that might come into play if you are drifting, but I can't figure out how to to that on my rt.

 

[Bob Denman]

It was sort of a random thought: we used to use sheet metal screws to keep our ATV tires in place. We were running about 5 psi, a LOT of horsepower, and the most extreme conditions possible! nojoke

We could spin the tires on the rims with a quick spin of the throttle... and those tires were designed to run at super low pressures! :shocked: