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The VIPER Garage  |  How To Instructions  |  How-to section  |  Tire and Wheel Weights and Fitment for Vipers
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Author Topic: Tire and Wheel Weights and Fitment for Vipers  (Read 1440 times)
RTTTTed
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Viper Nation - ezine
« on: September 15, 2015, 12:00:02 AM »

For calculating speed according to tire diameter, gears and diff ration I used this site; http://advanced-ev.com/Calculators/TireSize/index.html     To get the final gear ratio for the calculator use your overdrive ratio times the actual diff ratio.  My .75 overdrive equates to a final ratio of 2.30  Stock .5 overdrive in sixth with 3.07 would equal 1.53

After buying lots of different wheels and tires I think I have a pretty extensive knowledge of what fits and what doesn't

Gen 1s came with 3 spoke 17" wheels.

Gen 2s came with 17" wheels 1996 into 1998.  1996 and some of the 97 5 spoke wheels were cast aluminium while some of the 1997s and the 1998s were forged aluminium wheels.  The cast wheels have a tendency to crack if raced so the forged wheels are definitley the better choice for safety and high speed driving.  Some of the wheels were painted silver finished and others were polished with a clear coat.  The way to tell the cast from the forged wheels is to see if the back of the center is welded to the barrel - that would make it a cast wheel.

1998 until 2002 Vipers came with 18" forged wheels.  Polished and clear coated.  As with the other Viper wheels the fronts are 10" wide and the rears are 12" wide.  BBS came on the ACRs in a lightweight thin spoke version.

Gen 1 and Gen 2 wheels were 26" diameter.

2003 Vipers (Gen 3) came with 10 spoke polished and clear coated finish.  2006 coupes came with a lightweight spoke wheel.  The wheels on Gen 3 Vipers came as 10" x 18" fronts and the rears were 12" x 19".  The larger 19" wheels came on the Gen 3 to increase the effective gear ratio to pick up the 0 - 60mph times for the magazines.  The Gen 3 19" rear tires were 27.6" diameter.

The Gen 4 Vipers (and newer) came with a large variety of wheel options and styles.

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Although the Gen 1 and 2 share the same diamter tires at 26" the Gen 3 and newer use a 27.6" diameter tire which raises the effective gear ratio by nearly 10%.  This allows the Gen 3 Viper to make 60mph under throttle without requireing a shift into second.

CCW (Custom Classic Wheel) made the most popular racing wheels.  They have a set of Drag Pack wheels which are 5 x 16" front (pizza slicers) and 13" x 16" rears for wrinkle slicks.  The 16" rims fit the Gen 1 and Gen 2 Vipers.  Gen 3 and newer use 14" brakes all around and require the use of 18" rims front and back. 

CCW makes 17" racing wheels as well as 18" version racing wheels.  The 17" wheels will not fit over the 14" brakes and the Drag Pack rear wheels (16") will not fit over the ABS rear calipers because of the brake line attaching to the outside of the caliper.

The Gen 2 wheelwells can not fit 28" tires.  Running my Hoosier 14.5 x 28" x 16" Drag pack and slicks the slicks rub the forward portion, middle of the inner wheeltubs.  Running my slicks I rubbed a hole through my inner wheeltub.  I cut, bent and hammered both inner fenderwells to fit 31" tall tires.  What was required was to cut the frame crossmember and reweld a custom plate to retain strength, then dent and hammer the firewall behind the seat into a curved shape matching the curvature of the tires.  I wrote a How To on the modifications required.

To enable the use of 16" rear wheels on my 2001 GTS (ABS car) I bought a set of front to rear adapters from JonB and installed my Gen 2 4 piston Brembo front brakes onto the rear of the car.  All Gen 1 and 2 Vipers have junk rear brakes.  The calipers come from the DSM Galant/Eagle 2000GTX and are puny.  Even the ABS rear calipers are single piston with thin 13" rotors.  Using the heavy thick rotors and stockfront 4 piston Brembo calipers dramatically improves stopping.  It is also the upgrade so that the 16" Drag Pack wheels will fit on the rears.

For my big horsepower Twin Turbo Viper I bought a set of Drummond Race Car Wilwood brakes.  I believe these are 12.5" lighweight rotors with 4 piston Wilwood calipers.  These smaller brakes allow me to use my Bogart custom 15" wheels allowing any wrinkle slick I want for a lower price and better selection than the 12 and 14.5" slicks made for the CCW drag pack wheels.

It is certainly a big advantage to walk into a speed shop or tire store and have next day service for your slicks because the 15" tires are very common. 

« Last Edit: July 25, 2016, 11:34:06 AM by RTTTTed » Logged
1999 1200rwhp TT GTS - ART, 2001 Roe sc GTS- (4 sale), 440 Duster restomod (sold), 3x Stealth TTs, 92 Daytona IROC with T3, 580whp/1080wtq Cummins pickup.
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Viper Nation - ezine
« Reply #1 on: July 23, 2016, 02:05:37 PM »

I am starting a wheel/tire weight listing. 

CCW Billet 19 x 15 wheels with new Pirelli Pzero tires 355 x 25 x 19"  as shown in the first pic is 68lbs.  Very wide and very tall tires.
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1999 1200rwhp TT GTS - ART, 2001 Roe sc GTS- (4 sale), 440 Duster restomod (sold), 3x Stealth TTs, 92 Daytona IROC with T3, 580whp/1080wtq Cummins pickup.
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Viper Nation - ezine
« Reply #2 on: July 24, 2016, 06:42:50 PM »

HRE 18" x 10" with BFG KDW tires at 85% tread weighs                                                                      51#

CCW Race wheels 17 x 12 with 315 x 17 Hoosiers (used)                                                                     42#

CCW 17x 13 race wheels with 335 x 17 Hoosiers                                                                                 44#

CCW Race Drag pack 16 x 11 wheels with 14.5 x 16 x 28 wrinkle slicks                                                   44#

CCW race Drag pack 5.5 x 16 with Firestone 5.5 x 16" tires                                                                   32#

Forgeline VR1 Billet 18 x 11 with worn (25% tread) 275 x 30 x 18" tires                                                 45#

Forgeline VR1 Billet 18 x 14" with new Michellin PS2 335 x 30 x 18"                                                       55#
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1999 1200rwhp TT GTS - ART, 2001 Roe sc GTS- (4 sale), 440 Duster restomod (sold), 3x Stealth TTs, 92 Daytona IROC with T3, 580whp/1080wtq Cummins pickup.
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Viper Nation - ezine
« Reply #3 on: July 24, 2016, 07:10:34 PM »

I tried some R888s which reviews said were an excellent drag radail.  Not so much for me as they wheel hopped into 3rd gear. 

CCW 18" x 13s with Toyo R888s                                                                                                                             53#

Stock Forged 2001 5 spoke 18 x 13" with slightly used Hoosier R6s                                                                              66#

Some un mounted TIRE weights 

Michellin used PS2 275 x 18 (about 30% tread)                                                                                                         23#

BFG used Drag Radials 335 x 30 x 18"  ( about 50% tread left)                                                                                     30#
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1999 1200rwhp TT GTS - ART, 2001 Roe sc GTS- (4 sale), 440 Duster restomod (sold), 3x Stealth TTs, 92 Daytona IROC with T3, 580whp/1080wtq Cummins pickup.
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Viper Nation - ezine
« Reply #4 on: March 06, 2017, 12:48:13 PM »

I thought I'd sold my 18" CCW racing wheels so I dismounted the Road course slicks in preparation for shipping  It was another No sale, but shipping weight for the 6061 T6 Billet and forged racing wheels.

The 12 x 18" CCW wheel weighted 23#
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1999 1200rwhp TT GTS - ART, 2001 Roe sc GTS- (4 sale), 440 Duster restomod (sold), 3x Stealth TTs, 92 Daytona IROC with T3, 580whp/1080wtq Cummins pickup.
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Viper Nation - ezine
« Reply #5 on: January 20, 2018, 01:02:30 AM »

Recently I bought a 98 Hennessey Venom Viper.  It came with 20" wheels and tires.  The fronts measure 25" tall and the rears measure 26" tall.
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1999 1200rwhp TT GTS - ART, 2001 Roe sc GTS- (4 sale), 440 Duster restomod (sold), 3x Stealth TTs, 92 Daytona IROC with T3, 580whp/1080wtq Cummins pickup.
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