What does "Ahead" mean with forks

gt-arrowhead
gt-arrowhead Posts: 2,507
edited March 2013 in MTB workshop & tech
Hi, im looking to buy a new fork and the specs say this:

Entry level forks from Suntour offering amazing quality and performance at an amazing price.

•Travel: 80mm.

•System: Coil spring (both sides) with pre-load adjust.

•Brake: Disc brake IS mount & V-type

•Maximum disc rotor diameter: 185mm.

•Drop-out: 9mm.

•Lower: Monocoque magnesium.

•Crown: Alloy.

•Steerer: 1.1/8" x 255mm ahead

RRP £65

And heres the page: http://www.ebay.co.uk/itm/Suntour-XCT-V ... 5d39fd3e68

I currently run a 1 1/8 inch threaded headset with standard rigid forks.
I have no clue what "255 ahead" means. Also, does anyone know of another fork that would cost £40 max that is better than this?

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