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mikehallbackhoe mods for better mpg 05-17-2009, 02:02 PM

theclencher Most of what you've done will... 05-17-2009, 02:46 PM

mikehallbackhoe ??? most people get around 33... 05-17-2009, 03:54 PM

theholycow I don't know why he would say... 05-17-2009, 05:01 PM

theclencher 1. Cutting down the... 05-17-2009, 05:19 PM

mikehallbackhoe lowering a motorcycle is one... 05-17-2009, 07:14 PM

jeep45238 Yes - before the air cleaner... 05-17-2009, 09:09 PM

mikehallbackhoe thanks, I will give it a try 05-17-2009, 09:22 PM

theclencher Also if you get the... 05-17-2009, 09:32 PM

mikehallbackhoe thanks again,going to the... 05-17-2009, 10:04 PM

LTBrink I joined for the same reason.... 10-20-2012, 09:29 AM

Jay2TheRescue I tried to hypermile my... 10-21-2012, 06:20 AM

alvaro84 What about the 'common sense'... 10-21-2012, 08:57 PM

Jay2TheRescue I do shift early, and try to... 10-22-2012, 06:08 AM

JBW for best mpg 02-27-2014, 05:10 PM

cat0020 This may be off-topic, IMO,... 05-18-2009, 05:32 AM

mikehallbackhoe riding a motorcycle has very... 05-18-2009, 06:02 AM

cat0020 Then perhalps you should... 05-18-2009, 06:23 AM

mikehallbackhoe I have made my valkyrie more... 05-18-2009, 06:40 AM

LTBrink I know how you feel. I have... 04-29-2013, 12:05 PM

theholycow It's tough getting taken... 05-18-2009, 05:33 AM

theholycow There's nothing wrong with... 05-18-2009, 06:20 AM

theholycow Improving fuel economy in... 05-18-2009, 08:26 AM

cat0020 54mpg (370 mile range) on a... 05-19-2009, 07:34 AM

mikehallbackhoe I only accomplished 54 mpg... 05-19-2009, 04:14 PM

cat0020 I call BS, fuel economy good... 05-20-2009, 04:33 AM

Jim T. Never argue with cat0200. ... 07-03-2009, 09:16 AM

theholycow Contact patch size probably... 05-20-2009, 05:00 AM

cat0020 By pressure, do you mean the... 05-20-2009, 05:29 AM

theholycow No. "Pressure" in a tire... 05-20-2009, 05:44 AM

cat0020 My estimate: Valkyrie 700-720... 05-20-2009, 05:55 AM

mikehallbackhoe my valkyrie holds 5.3... 05-20-2009, 05:25 AM

Jay2TheRescue I'm sorry you feel that way,... 05-20-2009, 05:35 AM

LTBrink I like to hyper mile muscle... 10-20-2012, 09:13 PM

alvaro84 And I hypermile a 650cc... 10-20-2012, 11:03 PM

theholycow All that weight is on one... 05-20-2009, 06:12 AM

cat0020 You didn't specify the front... 05-20-2009, 10:53 AM

theholycow I asked how much weight was... 05-20-2009, 11:16 AM

cat0020 Different tire... 05-20-2009, 11:39 AM

theholycow Well, the stiffness of the... 05-20-2009, 11:52 AM

theclencher "The motorcycle tire will... 05-20-2009, 11:58 AM

cat0020 I wonder how much of a... 05-20-2009, 11:59 AM

theholycow I don't know which tire would... 05-20-2009, 12:19 PM

mikehallbackhoe as long as you are talking... 05-20-2009, 04:57 PM

Jay2TheRescue Sounds interesting. Do you... 05-20-2009, 06:11 PM

mikehallbackhoe sorry, I have no pictures... 05-20-2009, 09:43 PM

theholycow I wrote up detailed... 05-21-2009, 09:08 AM

mikehallbackhoe thanks, when my kids get back... 05-22-2009, 04:21 PM

DarbyWalters Funny, greeted kinda... 05-28-2009, 02:38 PM

mikehallbackhoe https://s619.photobucket.com/al... 05-28-2009, 05:16 PM

theholycow https://www.fuelly.com/attachme... 05-28-2009, 05:17 PM

mikehallbackhoe I don't know what went wrong,... 05-28-2009, 06:28 PM

GasSavers_BEEF you could always try... 05-28-2009, 06:43 PM

mikehallbackhoe is there a way to send it... 05-28-2009, 06:58 PM

theclencher 1. right-click over the pic... 05-28-2009, 07:09 PM

mikehallbackhoe https://www.fuelly.com/attachme... 05-28-2009, 07:22 PM

theclencher Success! :thumbup: Looks... 05-28-2009, 08:39 PM

mikehallbackhoe you don't want a car tire on... 05-28-2009, 08:55 PM

theclencher Go ahead and copy it. 05-28-2009, 09:57 PM

mikehallbackhoe thanks. if your goldwing is... 05-28-2009, 10:08 PM

theclencher 1982 model- kinda a pile 05-29-2009, 01:09 AM

mikehallbackhoe you will have a problem... 05-29-2009, 07:04 AM

Wyldesoul I'd say see about getting the... 05-29-2009, 10:54 AM

theholycow Wow, 90,000 mile warranty... 05-29-2009, 11:36 AM

palemelanesian Wait. There is a new... 05-29-2009, 12:09 PM

theholycow Interesting.... 05-29-2009, 12:17 PM

Wyldesoul All the HydroEdges are Green... 05-29-2009, 03:13 PM

GasSavers_mikemoss I think that 43 out of a... 05-30-2009, 05:42 PM

mikehallbackhoe I average 45 mpg most of the... 05-30-2009, 06:36 PM

GasSavers_mikemoss My bike will buck if it gets... 05-31-2009, 12:07 PM

mikehallbackhoe I really believe aerodynamics... 05-31-2009, 07:58 PM

theclencher You need to study the work of... 05-31-2009, 08:09 PM

mikehallbackhoe I have wondered about this,... 05-31-2009, 08:43 PM

theclencher I hope your friend kept good... 05-31-2009, 09:20 PM

mikehallbackhoe I also posted it on one of... 05-31-2009, 09:47 PM

CA ExhaustCoatings First off, for safety, adjust... 06-26-2009, 04:45 PM

mikehallbackhoe it,s nice to find a valk... 06-28-2009, 10:05 PM

CA ExhaustCoatings #2 setting is most likely to... 06-29-2009, 11:39 AM

mikehallbackhoe I am running my own home... 06-29-2009, 02:36 PM

CA ExhaustCoatings Calif. bike, u have the... 06-30-2009, 03:29 AM

mikehallbackhoe I have tried both cams, and... 06-30-2009, 08:27 AM

CA ExhaustCoatings did u notice any difference... 07-01-2009, 04:06 AM

mikehallbackhoe can't say I noticed a big... 07-01-2009, 06:44 AM

CA ExhaustCoatings that's a great avg at that... 07-01-2009, 09:16 AM

mikehallbackhoe my rear tire is a 205 60 16,... 07-01-2009, 10:20 AM

mikehallbackhoe I recently left a motorcycle... 07-04-2009, 10:48 AM

michaelwoodcock Hey man, whats your mileage... 07-06-2009, 05:57 PM

mikehallbackhoe the valkyrie has six carbs.... 07-06-2009, 10:55 PM

michaelwoodcock https://www.factorypro.com/prod... 07-07-2009, 01:55 PM

CA ExhaustCoatings "if it is carbed, be sure to... 07-08-2009, 09:45 AM

michaelwoodcock :o lol well just thought... 07-08-2009, 10:19 AM

michaelwoodcock also, I think you've... 07-09-2009, 12:58 PM

alvaro84 Hi! I'm new here, trying to... 07-27-2009, 10:57 AM

theholycow AFAIK there are no standards... 07-27-2009, 12:13 PM

alvaro84 I'm afraid they're too... 07-27-2009, 01:39 PM

theholycow I'd be wary of some of the... 07-27-2009, 02:06 PM

alvaro84 Thanks, I'll wade through... 07-27-2009, 02:42 PM

mikehallbackhoe I have tried eoc on my valk... 07-27-2009, 04:42 PM

michaelwoodcock That is where you just cut... 07-31-2009, 08:48 AM

theholycow EOC (Engine Off Coasting) is... 07-31-2009, 09:06 AM

cat0020 I perform EOC when I know... 07-31-2009, 10:57 AM

alvaro84 I usually shift in neutral... 08-02-2009, 09:41 AM

alvaro84 This morning I tried to shift... 08-03-2009, 08:52 PM

theholycow Yes, grinding is the correct... 08-04-2009, 04:47 AM

shatto Presumably that modern bike... 08-16-2009, 04:29 PM

alvaro84 I really don't know how could... 08-16-2009, 08:52 PM

theclencher I've heard it's relatively... 08-16-2009, 09:06 PM

alvaro84 We'll see in a few years ;) 08-16-2009, 09:36 PM

alvaro84 Oh, I forgot this post from 3... 10-20-2012, 10:59 PM

magua 85mpg on my F650gs 02-13-2010, 02:54 PM

shatto Freight trains can move a ton... 02-14-2010, 11:28 AM

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Old

05-20-2009, 05:29 AM

#11

cat0020

Registered Member

Join Date: Jun 2008

Posts: 278

Question

Quote:

Originally Posted by theholycow

View Post

Contact patch size probably depends mainly on pressure, not tire size. Contact patch shape is what changes when you change tire size. If there's 450 pounds on a tire with 45psi (pounds per square inch), it's going to have 10 square inches of contact patch. On a ten inch wide tire, that's a 1 inch long contact patch. On a 5 inch wide tire, it would be 2 inches long. On a 2 inch wide tire it would be 5 inches long.

Assuming the same pressure and a significantly larger tire, rolling resistance is reduced significantly. Oversizing while keeping the same inflation is effectively overinflating.

By pressure, do you mean the weight that the tire carries?

2-up on a 700+ lb. moto with 205 60 16 car tire vs 180 70 16 standard Valkyrie rear tire.. which do you think might have larger contact patch?

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