Wider Tires

wingz · Post by **wingz** » Tue Dec 03, 2013 10:26 am

I'm quite impressed with the stock Dunlops on mine.
I would certainly replace the rear tyre with a larger one when the time comes - primarily to improve the gearing above 90km/h.

Redwind, did you get the standard size tyres for your PCX?

dasshreddar · Post by **dasshreddar** » Tue Dec 03, 2013 12:13 pm

wingz wrote:The speedo on my 150 over-reads by 10%.
140/70-14 OD is 3% more than stock.
150/70-14 OD is 5.6% more than stock.

Is there any chance that a 150/70-14 would fit on the PCX?

Would be nice if I could get a 130/90-14.

I would assume a 150-70 would not fit...
With the 140 you may have to modify the inner fender slightly (kramnala has done this).

wingz · Post by **wingz** » Tue Dec 03, 2013 12:46 pm

dasshreddar wrote: I would assume a 150-70 would not fit...
With the 140 you may have to modify the inner fender slightly (kramnala has done this).

I had a look and the stock tyre appears to be <20mm from some of the plastic.
Some modification would be necessary.

ScooterMan · Post by **ScooterMan** » Tue Dec 03, 2013 9:20 pm

I'm going to speak authoritatively on this as a motorcycle mechanic and having owned over 25 motorcycles...DON'T put a 140mm tire on the rear of your PCX or a significantly wider front tire. The rim width is too narrow and will adversly affect (dangerously) the profile of the tire. It's not safe.

If they made a 110/90/14 that would be ok, or a 100/100/14...but my searches have shown they don't. I put a taller (not much wider) tire on my Elite 110 to gain 4mph top speed, but the profile is still safe as it's not that much wider than the OEM tire.

wingz · Post by **wingz** » Wed Dec 04, 2013 12:10 am

ScooterMan wrote:I'm going to speak authoritatively on this as a motorcycle mechanic and having owned over 25 motorcycles...DON'T put a 140mm tire on the rear of your PCX or a significantly wider front tire. The rim width is too narrow and will adversly affect (dangerously) the profile of the tire. It's not safe.

If they made a 110/90/14 that would be ok, or a 100/100/14...but my searches have shown they don't. I put a taller (not much wider) tire on my Elite 110 to gain 4mph top speed, but the profile is still safe as it's not that much wider than the OEM tire.

I would be worried about that too.

Bridgestone give recommended rim size:
TIRE SIZE..................REC. RIM (inch)..............MEAS. RIM (inch)
150/70-14M/C..................4.00...........................3.50 - 4.50

redwind · Post by **redwind** » Thu Dec 05, 2013 8:48 am

wingz wrote:I'm quite impressed with the stock Dunlops on mine.
I would certainly replace the rear tyre with a larger one when the time comes - primarily to improve the gearing above 90km/h.

Redwind, did you get the standard size tyres for your PCX?

Yes Wingz. Got the right size to fit the wheel size. Too bad mine didn't come with your stock Dunlop tires.

wingz · Post by **wingz** » Fri Dec 06, 2013 12:23 am

wingz wrote:
ScooterMan wrote:I'm going to speak authoritatively on this as a motorcycle mechanic and having owned over 25 motorcycles...DON'T put a 140mm tire on the rear of your PCX or a significantly wider front tire. The rim width is too narrow and will adversly affect (dangerously) the profile of the tire. It's not safe.

If they made a 110/90/14 that would be ok, or a 100/100/14...but my searches have shown they don't. I put a taller (not much wider) tire on my Elite 110 to gain 4mph top speed, but the profile is still safe as it's not that much wider than the OEM tire.
I would be worried about that too.

Bridgestone give recommended rim size:
TIRE SIZE..................REC. RIM (inch)..............MEAS. RIM (inch)
150/70-14M/C..................4.00...........................3.50 - 4.50

I have looked at my wheels. The front rim is 2" and the rear rim is 2.5".
So like ScooterMan said, 110/90-14 would be fine.

120/80-14 looks ok but I have only seen front versions in that size.

TIRE SIZE..................REC. RIM (inch)..............MEAS. RIM (inch)
120/80-14M/C............2.75.............................2.50 - 3.00

dasshreddar · Post by **dasshreddar** » Fri Dec 06, 2013 6:06 pm

ScooterMan wrote:I'm going to speak authoritatively on this as a motorcycle mechanic and having owned over 25 motorcycles...DON'T put a 140mm tire on the rear of your PCX or a significantly wider front tire. The rim width is too narrow and will adversly affect (dangerously) the profile of the tire. It's not safe.

If they made a 110/90/14 that would be ok, or a 100/100/14...but my searches have shown they don't. I put a taller (not much wider) tire on my Elite 110 to gain 4mph top speed, but the profile is still safe as it's not that much wider than the OEM tire.

Welcome to the Danger Zone!

wingz · Post by **wingz** » Sat Dec 07, 2013 12:50 am

dasshreddar wrote:
Welcome to the Danger Zone!

: barbosa.jpg (25.95 KiB) Viewed 2775 times

I would think the lean makes it less serious than having an over-sized tyre on a car.
Is it possible to move the outer surface of the tyre side to side while the wheel is stationary?

Ben2talk · Post by **Ben2talk** » Tue Dec 01, 2015 7:06 am

gn2 wrote:
dasshreddar wrote:I've been thinking about installing wider than stock tires on a pcx.
Why?
The standard size tyres are more than good enough.

More than good enough on a smooth, flat road surface. That's not good enough for cross country. Some of us have varied road surfaces, our needs are not always the same.

dkazzed · Post by **dkazzed** » Tue Dec 01, 2015 1:19 pm

OP, I think what you want more than wider tires are bigger wheel diameters.

Oyabun · Post by **Oyabun** » Tue Dec 01, 2015 2:54 pm

I'm running 110/80 at front and 120/80 at the rear on the stock wheels - and absolutely satisfied with the results.

dasshreddar · Post by **dasshreddar** » Tue Dec 01, 2015 3:41 pm

Ben2talk wrote:
gn2 wrote:
dasshreddar wrote:I've been thinking about installing wider than stock tires on a pcx.
Why?
The standard size tyres are more than good enough.
More than good enough on a smooth, flat road surface. That's not good enough for cross country. Some of us have varied road surfaces, our needs are not always the same.

Preach on brother

dkazzed wrote:OP, I think what you want more than wider tires are bigger wheel diameters.

yeah a 14" rear for the forza wheel would be nice, not sure if the pcx would be any better with say 16s"???

Oyabun wrote:I'm running 110/80 at front and 120/80 at the rear on the stock wheels - and absolutely satisfied with the results.

if you get a chance try some 120/140 you just might be more satisfied...

db22 · Post by **db22** » Mon Dec 21, 2015 9:04 am

This is a huge topic over at the Honda SOHC4 forum, where customizers put modern very wide rubber on their '70s CB750 and 550 rat bikes. I was tempted, and the traditionalists talked me out of it. I have been told that transitioning from a motorcycle to a scooter involves a learning curve, particularly in the corners, so fitting tires that improve cornering interests me.

FRossi · Post by **FRossi** » Thu Jan 28, 2016 12:49 pm

Guys, any mod was needed at air filter box with 140/70/14?
Anyone had problems with wrong rim size? That my only concern...

homie · Post by **homie** » Fri Jan 29, 2016 2:03 pm

FRossi wrote:Guys, any mod was needed at air filter box with 140/70/14?

Yes you need three steel spacers, easy mod see my video.

As for why did I need to go wider... LOOKS. If you do your PCX will look filled out, rounded, cosmetically balance, beauty and symmetry in motion!

Ride on you pencil sticks, you spindly, skinny, slippery, teeth chattering, fuel conscious stock tire PCX owners. No thank you, never looking back.
I ride with the Michelin MAN!

FRossi · Post by **FRossi** » Fri Jan 29, 2016 3:59 pm

Homie, thanks for the advice! My PCX is the 2013 one, I dont know if the spacers will be needed. Just in case I will carry a tube for making them.

Did you also had to change the bolts for longer ones?

homie · Post by **homie** » Fri Jan 29, 2016 5:14 pm

FRossi wrote: Did you also have to change the bolts for longer ones?

Oh I see now that you show your year, good man sorry.

For late 14's and 2015's you will need two bolts for the breather box, 1/2 inch longer than what you have since those are 1/2 inch spacers. The fender bolts was already long enough to handle the spacer.

txpcx13 · Post by **txpcx13** » Sat Feb 27, 2016 3:33 pm

Here is a really cool and helpful calculator to help you with tire width etc... should be helpful when you find some tires and want to compare them to OEM.
https://www.tacomaworld.com/tirecalc?ti ... -110-80r14
From my research I have done it seems like the easiest is to stay 90/90 front and move from 100/90 to 110/80 in the rear using City Grip tires.
It is so hard to find 14" tires for our PCX, and after much looking this is what I will go for in the future.
This setup for the rear tire is 10% wider and you will only lose 1/2 a mph at 65mph compared to stock.

k2apache6.0 · Post by **k2apache6.0** » Wed Jun 08, 2016 6:57 pm

homie wrote:
FRossi wrote:Guys, any mod was needed at air filter box with 140/70/14?
Yes you need three steel spacers, easy mod see my video.

As for why did I need to go wider... LOOKS. If you do your PCX will look filled out, rounded, cosmetically balance, beauty and symmetry in motion!
Ride on you pencil sticks, you spindly, skinny, slippery, teeth chattering, fuel conscious stock tire PCX owners. No thank you, never looking back.
I ride with the Michelin MAN!

Thanks for the video and spacer info. I'm about to do the same, but how much clearance is there to the shock springs, is there still room for YSS with wider shock springs to fit for example?

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