How do I measure my fork tubes to know what length I need?

Stock length is measured from the very top of the fork tube down to the center of the axle hole on the lower leg (slider). When you see tubes listed as "+2", "+4", etc., that measurement is in addition to the stock length for your specific model.

If I install extended fork tubes, what else will I need to change?

Going longer almost always requires more than just tubes. You will likely need a longer front brake line, and potentially longer throttle and clutch cables. Depending on how much you extend the front end, you may also need a new, longer kickstand to ensure the bike leans at a safe angle when parked.

What's the difference between 39mm and 41mm fork tubes?

This measurement refers to the outside diameter of the fork tube. 39mm is the stock size for most Harley-Davidson Sportster and Dyna models, while 41mm is the standard for larger bikes like Softails, FLs, and Touring models. The two sizes are not interchangeable as they require matching triple trees and lower legs.

Harley-Davidson Motorcycle Fork Tubes

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Cycle Standard 39MM Chrome Fork Tubes - 29 inch - 4 Over
4 reviews $244.73

Cycle Standard 39MM Chrome Fork Tubes - 33 inch - 8 Over
$282.90

Cycle Standard 39MM Chrome Fork Tubes - 35 inch - 10 Over
$304.55

Cycle Standard 39MM Chrome Fork Tubes - 27 inch - 2 Over
1 review $203.48

Cycle Standard 35MM Chrome Fork Tubes - 27-1/4 inch - 4 Over
3 reviews $180.20

Cycle Standard 35MM Chrome Fork Tubes - 31-1/4 inch - 8 Over
$184.10

Cycle Standard 35MM Chrome Fork Tubes - 29-1/4 inch - 6 Over
2 reviews $190.54

Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 24 inch - 4 Over
1 review $185.57

Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 26 inch - 6 Over
$195.88

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 28-1/4 inch - 4 Over
$200.94

Custom Cycle Engineering 39MM Ultra Chrome Fork Tubes - 34-1/4 inch
$717.95

Cycle Standard 41MM Chrome Fork Tubes 1977-1984 Harley-Davidson FL/FLH - 28-7/8 inch - 8 Over
$206.69

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 30-1/4 inch - 6 Over
$208.14

Cycle Standard 35MM Chrome Fork Tubes - 25-1/4 inch - 2 Over
2 reviews $173.31

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 32-1/4 inch - 8 Over
$217.13

Cycle Standard 35MM Chrome Fork Tubes - 23-1/4 inch - Stock Length
2 reviews $166.66

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 34-1/4 inch - 10 Over
$222.77

Cycle Standard 41MM Chrome Fork Tubes 1977-1984 Harley-Davidson FL/FLH - 26-7/8 inch - 6 Over
$185.68

Cycle Standard 39MM Chrome Fork Tubes - 25 inch - Stock Length
5 reviews $213.32

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 26-1/4 inch - 2 Over
$168.11

Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 20 inch - Stock Length
$164.95

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 24-1/4 inch
$162.55

Cycle Standard 39MM Chrome Fork Tubes - 31 inch - 6 Over
14 reviews $250.26

Custom Cycle Engineering 39MM Ultra Chrome Fork Tubes - 32-1/4 inch
1 review $717.95

Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 22 inch - 2 Over
$175.26

Custom Cycle Engineering 39MM Ultra Chrome Fork Tubes - 24-1/4 inch
$717.95

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