Tire Pressure?

[Peter Aawen]

I wonder what pressure I should use when I switch to car temporary spare tires when I need new front tires? They are slightly narrower than the current front tires.

Generally, those Temporary/Space Saver Spares are 'smaller volume' tires that need significantly higher air pressure in them to carry the same load as the tire they are replacing, so you might want to check the pressure/load info for the particular tire with its manufacturer, once you know the load your Ryker will be putting on it! Also, most car temporary spare tires will have a lower speed rating than the OE Spec tires on your Ryker, so you should check the legalities of running them wherever you are. :dontknow:

Running a lower speed (or load) rated tire than the OE Spec tire is definitely NOT LEGAL at all here in Australia! :lecturef_smilie:

Even cars with Space Saver Temporary spares note the speed limited rating on their tire placards, have stickers & directions all over the place reminding people not to drive the car too far or too fast once the spare is fitted, & the space saver tires are fitted onto different (brightly) coloured (space saver) rims so that anyone (ie, Police...) can tell at a glance that the vehicle is not meant to be being driven at speeds higher than 80 kph! (50mph-ish) There are also often (technically) time & 'distance in use' limits on those tires - they just aren't intended or designed to be used as a 'full-time/service tire' at all! I wouldn't recommend running them on anything except as the temporary spare they were designed to be! :shocked:

Why don't you fit a similar sized 'proper' car tire? There are slightly different sizes available that meet or exceed the OE Spec Load & Speed ratings, and some even get very close to the same rolling diameter as the Kendas so as to keep the Nanny happy! Altho she really isn't all that likely to be upset by anything within about a +/- 10-15mm rolling diameter variance. There's really no need to fit a Temporary Spare, which is very likely an even LESS suitable tire than the OE spec Kenda - while it might be quite hard to believe that's even possible, running a Temporary Spare as a 'Full-time/service tire' will be doing just that! :gaah:

But it is your Ryker & your life.... and maybe the life of the person/s you could hit when your 'temporary spare' fails due to its misuse.... :dontknow:

 

[rakerrykerrider]

I wonder what pressure I should use when I switch to car temporary spare tires when I need new front tires? They are slightly narrower than the current front tires.

Are you serious? You're jiving us, right?

 

[Markubis]

I wonder what pressure I should use when I switch to car temporary spare tires when I need new front tires? They are slightly narrower than the current front tires.

Why not replace the existing tires with the same brand?

Even if you don't like the quality/performance of them, surely they will be better than a car spare tire. Spare tires are only designed for short term use and have speed and handling limitations.

You're better off replacing with the same tire and wait for an aftermarket tire or an aftermarket fender that allows slightly wider tires.

 

[MDLNB]

I'm not an expert on the matter so I will just pass on what I have been told by a Spyder owner that I know. He said he replaced his tires with car tires because they are cheaper and last longer. I have found CAR replacement tires for the Rally rear wheel that are one third the price of dealer tires. Of course, the front tires on the Ryker are different, so I doubt there are any comparable car tires on the local market without possibly special ordering. Just my two cents. My Rally is new and I am limiting my use until I receive replacement wheel hub nuts. I have no problem with using the Ryker but since the service Dept advised against it, my spouse gets too upset when I think about riding much more than short local runs with it. So, I will not have to worry about replacing my tires for some time, unless of some accidental damage occurs.

 

[Aufgeblassen47]

The so-called "temporary" spare has a speed rating of 81 MPH. Since the weight on it will be minuscule compared to both a 4 wheeler application and its actual weight rating, it will be bulletproof in a mere Ryker application.

 

[KC61]

Tire threads are like oil threads, everyone has their own opinion.

 

[Markubis]

The so-called "temporary" spare has a speed rating of 81 MPH. Since the weight on it will be minuscule compared to both a 4 wheeler application and its actual weight rating, it will be bulletproof in a mere Ryker application.

The traction and handling will be inferior to a full time tire.

 

[Rogue Hawk]

I have it set to 20-20-25 and it stopped jumping around. I was not aware tire pressure is so important.

 

[sKiZo]

Running temp spares on a bike with sensitive steering is kinda like running speed laps barefoot on rubber crutches. Forget the basic universal tread and inferior construction and don't forget they usually don't have a lot of tread depth or longevity.

They also tend to run hot due to less sidewall flex at 60psi. Lowering the pressure would make for a softer ride, but less control due to inferior sidewall construction.

It's almost like they're designed to fail if run outside the stated speed, distance, or load. For folks trying to save some bucks, DO expect them to wear a lot faster than a real tire. I'd pass.

Be interested in the theory behind the Rally's lower pressure requirements for the majority of folk who seldom do any off road. Typically you'd reduce the pressure for serious off road, but jack up the PSI on pavement ...

 

[Zoot]

The traction and handling will be inferior to a full time tire.

Temporary spares have next to no tread and the walls are super thin. I check my car spare (pressure 60 psi!) frequently, and add air frequently. They lose pressure faster than the "real" tires, I suspect the air just migrates through the sidewalls faster...

 

[KnurledNut]

We are so fortunate to have many pneumatic and motorsports engineers on this forum.

How would we be able to do anything without them?

<end sarcasm>