Mainly eXtended durability. I did a comparison of brand new blockades in M3 and x3 and felt no performance change but the X still look new after two full race days running the same set for practice, 6 min quals and 30 min main

Hmm, now I gotta go make sure I have M3s vice X3s.

Edit: Yep, M3s. I ran M2s last week and they did very well in the same temps (as expected). I'll probably grab a set of each along with the Gridiron IIs.

I don't buy M or AKAs (except catapults) because the X is such a better value. M2 is medium, you usually use medium compound?

Best I can do is a jpeg. Tried to zip it but it's still a tiny bit too large.

Hey guys, a little off topic but few things I have noticed and heard regarding the X vs M proline compound. You always want to choose a hardness based upon temp (i.e. 4,3,2). Then you want to choose M vs X based upon moisture in the track. M is primarily used for wet surfaces and X is for dry. Also X is slightly harder than M at the given compound. I have also heard X doesn't expand as much as M which might provide more stability at high RPM .

Thanks bud, helps a lot! X would definitely be a better choice for practice at Revelation. JBRL is hit and miss with the amount of water that is laid down so I'd keep both on hand if that is the tire I go with. Wont know until I try out the Gridirons though.

Seems your track is friendly to tires, our local track chews everything in just one race day - Pl's X compound, AKA's mediums...

What is the part numbers for the shoes?

LOSA9107 for the composite shoes, LOSB3327 for the aluminum, LOSA9113 green springs, and LOSA9114 for the golds.

m compound for moist surfaces or a surface that hasn't developed a groove
and X compound for dry groeved track.
typically use M3 in the beginning of the day and then x4/x3 in the middle of the day then back to m3 later in the day.

lol looks familiar!

It should, see post 2141 I didnt have to make many changes at all, it just worked great at Revelation. I havent run it at another track yet but I think you've nailed the baseline setup for outdoor tracks.

Mo put a lot of work into this setup and it's killer everywhere. You won't be disappointed....

Oh, found an image of the Proline compound chart and X is listed as a high speed compound and the temp range is quite a bit different than the M compounds. Revelation has a nice groove but it is far from a high speed track with all the 180° turns and short jumps. M2 would have been the way to go yesterday but my only set were decimated during engine break in on the street

Thank you :-)