I run a 225/60/R15 Kumho on the rear of my 2013 RT Ltd, the same size should fit your ST. Because it's a larger tire with a larger volume of air inside it but the load on it hasn't changed, I run a little less air pressure in it than I did on the stock size & yet I still get even tread wear across the face of the tread - over 15,000 miles already vs the less than 4k on the Kenda! And at 22-14 psi, the speedo is pretty much spot on; however, if I inflate the tire to 28 or 30 psi the speedo can read one mph or so under true, so it's a close thing. :sour:
Possibly (depending on tread depth & the way the particular tire manufacturer measures their 'nominal' tire size) that size tire in another brand could just touch on the Spyder under-pinnings, but like I said, on my RT running a Kumho Solus KH17 225/60R15 it's clear of everything underneath throughout the full range of suspension travel & tire deflection; altho when riding thru sticky mud if the tread picks up too much goop it does tend to scrape that off on the bottom of the shock mount as the tire rotates - but I suspect that (depending on the muck) that sort of thing would happen anyway, regardless of the tire size!
And the traction, ride, & handling I get is soooo much improved than I ever got from the Kenda, it's not funny!!
Over to you.
.:gaah:...Interesting about this TIRE....I checked with TWO major marketers in the USA for it ( Tire Rack & Discount Tires Direct )....Neither one lists it......So it may only be available in Australia !!!!........Also this Size is 1 1/2 inches larger in Diameter then a 225/50-15......Good luck trying to get that under the rear fender of an ST..........:banghead::banghead::banghead:...........Mike :thumbup:I run a 225/60/R15 Kumho on the rear of my 2013 RT Ltd, the same size should fit your ST. Because it's a larger tire with a larger volume of air inside it but the load on it hasn't changed, I run a little less air pressure in it than I did on the stock size & yet I still get even tread wear across the face of the tread - over 15,000 miles already vs the less than 4k on the Kenda! And at 22-14 psi, the speedo is pretty much spot on; however, if I inflate the tire to 28 or 30 psi the speedo can read one mph or so under true, so it's a close thing. :sour:
Possibly (depending on tread depth & the way the particular tire manufacturer measures their 'nominal' tire size) that size tire in another brand could just touch on the Spyder under-pinnings, but like I said, on my RT running a Kumho Solus KH17 225/60R15 it's clear of everything underneath throughout the full range of suspension travel & tire deflection; altho when riding thru sticky mud if the tread picks up too much goop it does tend to scrape that off on the bottom of the shock mount as the tire rotates - but I suspect that (depending on the muck) that sort of thing would happen anyway, regardless of the tire size!
And the traction, ride, & handling I get is soooo much improved than I ever got from the Kenda, it's not funny!!
Over to you.
pps:
...Dave , He has a Kumho Solus ......KH17.....so this is the tire I was looking for !!!!... but thanks for the effort.......Mike :thumbup:
...... ERROR ........Bob Denman is " The Tire Chart Guy "...not me, I only use individual specs given by the manufacturer.........Mike :thumbup:Funnily enough Mike, the tire suppliers here tell me this 225/60R15 size is more popular in the States than it is here in Oz!! :hun: But you certainly could be right about it being a 'different availability/different spec' thing, altho the KH17 is a reasonably common size/spec tire here, being one of the more used comfort/ touring size/specs for mid/high end vehicles; still, it shows up as an acceptable tire size/spec for use on a fairly significant range of vehicles, including GM, FORD, Cadillac, Nissan, Toyota, Mazda, & a bunch more including European makes... :sour:
As for the differences in tire size, that's one of the traps of using tire size calculators rather than doing a direct comparison. I did a direct comparison, & the Kumho Solus KH17 225/60R15 at 28psi on the stock rim came in at 22mm larger rolling dia than a new Kenda 205/50R15 at 28psi on the stock rim, which is within the specs for easy handling by the Nanny (especially when teamed with similarly larger front tire sizes plus my generally running a lower pressure in the tire - bigger bag needs less air to carry the same load, & at 22-24 psi the speedo is spot on accurate!!) How can this be so? Simple really, tire manufacturers don't all use the same baseline or sizing conventions, so a nominal sized tire from one manufacturer may well be somewhat different in reality to the same nominal sized tire from another manufacturer!! Hey, the same sized tire but with a different tread could well be different in rolling dia/circumference even if the tires are from the same manufacturer!! Some use the tire carcass or casing as the basis for sizing, some use the case plus a nominal tread thickness, others use casing plus actual tread thickness; and then there's all the differences that running different air pressures or even running the same tire on a different width rim can bring!! :banghead: And yeah the Nanny hasn't objected to this sized tire AT ALL; in fact, if anything she likes running this sized tire on the rear with 175/60R15's up front even better than she liked running the stock spec tires all around, with less needless interference but even more impressive braking & handling/steering than the Kenda's ever achieved as well as a mire comfortable ride - but they are a heavier construction tire with higher specs in wear, speed, & load carrying; and I do have a BajaRon bar up front too!! So there's less scope for loose or sloppy handling & better traction/handling to start with!! And as a result, these tires not only feel/behave better, they have already lasted significantly longer than the crap the Spyder came on!!
But you may be right about fitting the bigger tire under the ST fender Mike!! (& others) I hadn't thought of that when I posted first, but the RT fender is higher/further away from the top/rear of the tire, with the closest point being up front at the shock mount/swing arm pivot end; while on the ST the fender wraps around the rear of the tire from the axle end of the swing arm - so it might pay the OP to measure very carefully there before spending the $$ on a 225/60R15 & then finding you need to toss the fender to get it to fit!!
pps:
There are a lot of different riders out there, which means a lot of different specific needs & wants, so there could be all sorts of reasons for making the choice to go to a different profile.... :sour:
In my case, it's quite simple: for what I do & want from the Spyder, the Kenda's that came on the Spyder are absolute crap!! I didn't get more than 4000 miles out of the Kenda on the rear, nor 6000 miles out of the Kenda's on the front, but then I do ride the bulk of my riding on some pretty rough roads in fairly high temperatures, neither of of which are recommended or conducive for/to running soft compound low profile tires.
So by choosing to run a higher profile tire I immediately increase the ground clearance (& that means less scraping & underbody damage) PLUS I get better tire life! The higher profile tires not only raise the bike a little, but they also have higher speed, wear, & load ratings; so I get more of a 'cushion' of air inside the tire to protect the Spyder itself & the rims from impact damage; the taller tires when run at slightly lower pressures are far more resistant to punctures because they have more 'meat' to allow flex/conforming over sharp road hazards plus the stiffer sidewalls & stronger tread plies are better/safer too, especially considering what I do/want from them; and the slightly larger rolling dia means just a handful fewer revs per mile which means less wear, better fuel economy, & more comfort with very little (if any) impact on performance.... and all those benefits add up!! :thumbup:
So for what I do & want from my Spyder, it's a logical & smart choice to run a slightly larger & vastly more robust tire.... in fact, one hasta ask why wouldn't anyone with the same needs/wants do the same???
But then, you may have completely different needs & wants & even different expectations to mine... so your choices may be somewhat different; but it still doesn't mean that you are wrong (despite being significantly 'wrong' according to what I need/want/expect!!)
