thats why i have 26" tires with my 4.10's, 4th gear@6000 is 113.2mphTrainman said:Here's something to think about for those of you wanting to go to 4.88 gears if you plan on Legal 1/4 mile drag racing. The best tire available at this time is the M&H 390-40-17 Drag radial and it is 29.5 inches tall. Our stock tire 305-40-22 is 31.5 inches tall. The 4.88 should feel real great around town if you can get traction....but here is what the limitations are....with the drag radial installed and 4.88 gears your top speed in 4th gear @ 6000 rpm is limited to 107.34. I know a lot of you guys say you won't go over 5500 rpm so that limits 4th gear to a speed of 98.89 with 4.88 and 390-40-17 drag radials. Most of you know that I have a 2004 RC and I have gone to 4.56 gears. I have a stock engine with headers and a tune. On drag radials I have clocked a best speed of 111.31 mph which is 5,782 rpm in 4th with 4.56 gears. If I had 4.88 gears I would have to shift into 5th gear to finish the 1/4 mile....not good.