Lost speed

Flyingbryan · 01-22-2012, 07:37 PM

Wile the taller tire might get you more top speed but your Speedometer would not know you are going faster. Infact the top speed may be the same or faster but you need a GPS to know for sure. Really a before and after GPS reading would be the way to tell.

superbri · 01-22-2012, 07:51 PM

Quote: Originally Posted by joshuabuilt

with a taller tire wouldnt you be getting more top end?! It would just take longer to get top speed cause u loose low end

Theoretically yes if you had the power to push the additional gearing. But with the taller bigger tire also comes more weight also which robs horsepower.

Xelvic · 01-22-2012, 07:53 PM

With stock tires, when my speedo says 74 I'm doing 71. So the speedo is a little off anyway.

SaintlyBrees · 01-22-2012, 08:27 PM

Quote: Originally Posted by Flyingbryan

Wile the taller tire might get you more top speed but your Speedometer would not know you are going faster. Infact the top speed may be the same or faster but you need a GPS to know for sure. Really a before and after GPS reading would be the way to tell.

I'm guessing that the point made in Bryan's post (quoted above) has more to do with your speed issue than an actual loss of speed. Your dealer should be able to recalibrate your speedo to your new tire size...

Mud Yapster · 01-23-2012, 09:53 AM

maybe you need to clean the speed sensor.

///AIRDAM · 01-23-2012, 11:52 AM

usually you lose top speed because the engine just gives out and dont have enough power to pull the larger heavier tires. think of this:

take a brand new ford 150, or chevy 1500 crew cab truck. put a leveling kit on it and a set of 33x12.50 mud tires. they will fit fine, but your gas mileage, and top speed and acceleration will all suffer. why? because the motor just dont wanna pull the larger heavier tires with the gear ratio the trans and diffs have. just too big and heavy of a tire. most any owner with 27-29" mud tires can only do about 65. nothing new. just how it is. the engine just dont have the power to pull those tires past that speed. clutching it wont make hardly difference. you are fighting power, and gear ratio. a clutch kit wont fix that.

Polaris425 · 01-23-2012, 12:20 PM

^ Clutch kit wont fix top speed, but will definitely fix the lost low end and some lost acceleration.

01-22-2012, 07:37 PM	#11
Flyingbryan Senior Member Join Date: Sep 2010 Location: Burbank, CA Member #686 Posts: 1,441 ()	Wile the taller tire might get you more top speed but your Speedometer would not know you are going faster. Infact the top speed may be the same or faster but you need a GPS to know for sure. Really a before and after GPS reading would be the way to tell. __________________ Bryan

01-22-2012, 07:51 PM	#12
superbri Senior Member Join Date: Jan 2011 Location: Eastvale, CA Member #1538 Posts: 360 ()	Quote: Originally Posted by joshuabuilt with a taller tire wouldnt you be getting more top end?! It would just take longer to get top speed cause u loose low end Theoretically yes if you had the power to push the additional gearing. But with the taller bigger tire also comes more weight also which robs horsepower. __________________ 2011 Red XT, custom 4 seat radius cage/TS rear seat, K&T box, 2X tie rods, Elka stage 4 shocks, Full STM clutch

01-22-2012, 07:53 PM	#13
Xelvic Senior Member Join Date: Jun 2010 Location: Tucson, AZ Member #312 Posts: 2,418 ()	With stock tires, when my speedo says 74 I'm doing 71. So the speedo is a little off anyway. __________________ 2011 Can am Commander 1000X: 2X Motorsports Tie Rods Can am full skid plates Warn XT 4500 winch Street Legal kit (AZ) BRP Black Race Box Auto Meter Gauges MrRpm oil adapter Engine Oil Cooler MadeByMe Roof CvTech Clutch

01-22-2012, 08:27 PM	#14
SaintlyBrees Senior Member Join Date: Sep 2011 Location: Chama, NM Member #3371 Posts: 253 ()	Quote: Originally Posted by Flyingbryan Wile the taller tire might get you more top speed but your Speedometer would not know you are going faster. Infact the top speed may be the same or faster but you need a GPS to know for sure. Really a before and after GPS reading would be the way to tell. I'm guessing that the point made in Bryan's post (quoted above) has more to do with your speed issue than an actual loss of speed. Your dealer should be able to recalibrate your speedo to your new tire size... __________________ 2012 800R XT Camo In-dash Garmin 650t Navigation (TX to Bryan for his install video) Bad Dawg Hard Roof Bad Dawg 1/2 Windshield Bad Dawg Dual Storage in rear Rear view Mirror TurnKey UTV Heat Shield for bed TurnKey UTV Harness Bar Can-Am LH & RH Side Mirrors Rear Can-Am Screen Can-Am Snow Plow Can-Am radiator protector Can-Am Cover K&N Air Filter 12/1/14 - Extended warranty ends and mods begin

01-23-2012, 09:53 AM	#15
Mud Yapster Senior Member Join Date: May 2011 Location: Earth Member #2464 Posts: 1,330 ()	maybe you need to clean the speed sensor. __________________ Commander XT/X 1000 *The* *Mud Mafia* *You hit this we hit you!!!!*

01-23-2012, 11:52 AM	#16
///AIRDAM Senior Member Join Date: Nov 2010 Location: central mississippi Member #1197 Posts: 214 ()	usually you lose top speed because the engine just gives out and dont have enough power to pull the larger heavier tires. think of this: take a brand new ford 150, or chevy 1500 crew cab truck. put a leveling kit on it and a set of 33x12.50 mud tires. they will fit fine, but your gas mileage, and top speed and acceleration will all suffer. why? because the motor just dont wanna pull the larger heavier tires with the gear ratio the trans and diffs have. just too big and heavy of a tire. most any owner with 27-29" mud tires can only do about 65. nothing new. just how it is. the engine just dont have the power to pull those tires past that speed. clutching it wont make hardly difference. you are fighting power, and gear ratio. a clutch kit wont fix that.

01-23-2012, 12:20 PM	#17
Polaris425 Senior Member Join Date: Jan 2012 Location: Bama Member #4198 Posts: 209 ()	^ Clutch kit wont fix top speed, but will definitely fix the lost low end and some lost acceleration. __________________ Sold: '00 Polaris Xpedition 425 Sold: '86 Honda 350X Trike Sold: '00 Polaris Scrambler 500 4x4 Sold: '07 Brute 750

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