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General Category >> Rubber Side Down! >> YouTube tire videos- interesting comment on width
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Message started by Dave on 08/25/19 at 04:16:01

Title: YouTube tire videos- interesting comment on width
Post by Dave on 08/25/19 at 04:16:01

I watched this video and most of the comments are not surprising.....they support what I have come to learn about tires over the years - (my tire buying experience is limited to a few Cruiser sets, and lots of Sport Touring tire sets). Unfortunately the tires choices for the stock Savage rear tire are going to be limited to tires made for Cruisers......and they don't offer any multiple tread compounds that have hard rubber in the center for road mileage and soft rubber on the edges for cornering grip. Cruiser tires tend to be built for longer tire life with a bit less performance - low cost tires last about 8,000 miles while premium tires can go as many as 20,000 miles. The 100/90-19 front tire is available in Sport Touring tires and you can find both Cruiser and Sport Touring tires. Sport Touring tires can be very soft and wear out in 4,000 miles if you ride aggressively - while multiple compound tire can last up to 10,000 miles. For those who have changed their rims to go tubeless or to make Cafe' or Tracker bikes....you will be able to find Sport Touring tires that fit your bike.

http://www.youtube.com/watch?v=x5CFUEHF2-M
[media]http://www.youtube.com/watch?v=x5CFUEHF2-M[/media]

The video on tire width supports what I have come to learn about tire width - that overly wide tires are there for looks and can actually hurt performance. He also commented on wider tires on narrow rims altering the tire cross section profile and I have commented on that previously in the tire thread on this forum - and putting a wide tire on a too narrow rim reduces the tire footprint and can reduce traction and accelerate wear. The relatively light 30HP Savage has far more rear tire than it needs for good traction, and a smaller/thinner tire would actually make the bike accelerate, brake and corner better. The 130/90-15 rear tire is an upgrade in handling....the 140/90-15 rear tire is an option for those who want to improve the gearing for highway use (at a small cost in handling).

What I find very surprising in the video was the concept discussed at 2:40 in the video....wider tires require more lean in the corners! This took a while for me to understand - but it turns out the footprint moves farther inside and away from the centerline of the bike, and that requires more lean to balance the cornering forces (it seems weird but a wider tire will cause you to drag a footpeg or frame sooner than a narrow tire will)!

http://www.youtube.com/watch?v=_hPTiYh4fic
[media]http://www.youtube.com/watch?v=_hPTiYh4fic[/media]

Title: Re: YouTube tire videos- interesting comment on wi
Post by Matchless G11 on 08/25/19 at 05:18:03

I have noticed the wide tire issue in corning. Most of my bikes have had 400-18 on the rear, (Guzzi). When I got my ryca it has a large 150 -18 something on the rear. while it handles well it take more effort in corning .
I would like to put a 4.00 18 on the rear but I need to replace the rim for a narrower one. (maybe some one on the forum has a already laced rim for 18, in exchange for one with a wide one)

Title: Re: YouTube tire videos- interesting comment on wi
Post by batman on 08/25/19 at 05:21:48

Years back ,due to my girlfriend have some damage to discs in her back, I put 11.5" progressive shocks on the rear of the bike. That alone ,elevated the rear of the bike enough to stop the front pegs from ever scraping again no matter how hard I leaned the bike. It also shortened the wheel base , and decreased the fork angle slightly, but I didn't really feel the difference in handling until my last tire change when I choose to use a 130/90/15 rather than the 140 /90/15 . I felt the change immediately. I'll never use a 140 again, and I may try a 90/90 19 next time on the front , to see if that may also improve things.

Title: Re: YouTube tire videos- interesting comment on wi
Post by hotrod on 08/25/19 at 08:08:44

I have never had to replace a front tire due to wear. It was always a issue of age or to match a rear tire of another brand or pattern. Most rears look shot at around 6000 miles. That's how it has worked out for me.

Title: Re: YouTube tire videos- interesting comment on wi
Post by DragBikeMike on 08/25/19 at 18:22:27

Good vids Dave. Thanks

Regarding tire dimensions, can anyone tell me what the difference is between a 140/18-15 and a 140/80B-15? What is the significance of the letter "B"?

Title: Re: YouTube tire videos- interesting comment on wi
Post by Gary_in_NJ on 08/26/19 at 06:09:20

50565925272024140 wrote:
Regarding tire dimensions, can anyone tell me what the difference is between a 140/18-15 and a 140/80B-15? What is the significance of the letter "B"?

B=Bias-ply
R=Radial

Title: Re: YouTube tire videos- interesting comment on wi
Post by ohiomoto on 08/26/19 at 06:49:43

DragBikeMike needs to post something right quick. His post count is sitting on 666.

Title: Re: YouTube tire videos- interesting comment on wi
Post by Dave on 08/26/19 at 07:25:11

5E777B7B736427160 wrote:

Riding style has a lot to do with how tires wear on your bike.

If I am riding aggressively and brake hard at the entrance to the corner while MM and I are chasing each other around in the mountains - I put a lot of wear on the sides of the front tire. If I do a lot of riding like this I can wear the front tire out just as fast as the rear tire. The back tire does the accelerating - the front tire does the braking!

Title: Re: YouTube tire videos- interesting comment on wi
Post by justin_o_guy2 on 08/26/19 at 07:27:27

Enjoyed and learned from the videos,
Thanks Dave