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Discussion Starter #1
Going to Alaska in five weeks and will need to get at least a new rear tire on my '07 DL650 while up there. I'm leaving home with Mitas E07 Dakar tires. Place where I will get a new rear from doesn't carry Mitas but does carry the famous Heidenau K60 tires. I do have to pre-pay now to ensure they have one in stock when I get there.

The question I have is that the stock rear size for my Wee is 150/70-17. Place I'm getting it has recommended that I actually change sizes when I get a new one put on up there and get a 140/80-17 because they say:

Narrower tire tracks better
Provides a few extra horsepower
Improves handling
Cost less

I'll be riding all kinds of road surfaces up there as well as very long, very fast miles on the interstates coming home.

Does anybody see any problem with going with the 140/80-17 when I swap tires up north to have new rubber for the ride back south? Cool thing is if I get up there and don't need the rubber to make it back home, they will refund my pre-payment.
 

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You shouldn't have any trouble. And if that is Dan in Fairbanks, just do what he says. :fineprint: Great guy.
 

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Well, consider how much time you will spend on road
Tracking, never saw much benefit to a narrow tire
Load float will suffer
Horsepower, is a constant changing a tire cannot change a constant
Handling, may suffer if you are used to a state of responsiveness and the narrow tire changes that, do you want to have that on unfamiliar roads.
I would probably ship a tire from the lower mainland than buy a different one
 

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Buy a tire at home and have it shipped up there so it's there if you need it. Worst case is you have to ship it back. Then you will have the one you want. I do that with other things for trade shows and stuff. Takes the worry out of things.
 

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A 140/80 tire is 112mm high where a 150/70 tire projects only 105mm from the bead which means that the change will ever so slightly gear your bike up. To me that would contradict the "more horsepower" claim. However a narrower tire will be less nervous over loose ground. Heidenau's have a good reputation although their hard carcass to give good mileage does make some riders a little nervous on wet seal.
If you are at all apprehensive, and are prepaying for the tire anyway, why can you not order what you want?
That said, I have found that motorcycle shops that have been around for a while have local knowledge and know that their best advertising is their reputation.
 

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Discussion Starter #7
If you are at all apprehensive, and are prepaying for the tire anyway, why can you not order what you want?
I can order whatever size I want. I'm just asking about the size recommendation that was made, that's all. I'm no tire tech and don't really understand whether his recommendation is better than the stock size or not. Just looking for feedback so I can make the best decision possible. :bom_gossip:
 

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Or look at it this way: it's an opportunity for a scientific experiment.

Either way, you're not gonna be getting a BAD tire. It'll work just fine.

Worst case, you're simply not going to be able to tell much difference, other than a new tire usually feels nicer than a worn tire.

Best case, you'll say to yourself "Huh, this does work a little bit better. I guess the folks who live and ride around here know a thing or two".
 

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I ran a 140/80 K60 (I couldn't get a 150/70 at the time) on my wee for about 11k miles, I really liked that tire. It was so squared off by the time I changed it it looked like a car tire, I probably could have gotten another 1 or 2K more miles out of it though.
 

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I ran a 140/80 K60 (I couldn't get a 150/70 at the time) on my wee for about 11k miles, I really liked that tire. It was so squared off by the time I changed it it looked like a car tire, I probably could have gotten another 1 or 2K more miles out of it though.
This, sort of. I've run a few 140/80 K60s. At first it was because I couldn't get a 150, after that it was because they took the 150 tread pattern a little too far towards the street end of the spectrum. So I kept on using the 140s. Now I'm running an E07 Dakar. I've got a fresh one for the Alaska trip and an E10 Dakar front that should be here this week. I got in touch with Adventure cycleworks a few weeks ago about getting an E07 up there, but I'd have to buy it and ship it myself. I decided it's just easier to to buy what they have, So I told them I'll take a TKC front and a K60 in the 140 size because I didn't want a 150 even though that's the stock size.
 
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