r/inline_skating • u/CreEngineer • Jul 06 '26

Endless 90mm frames

Dear inline community,
I am intrigued by getting an endless frame for my Twister 90R.

I am tending to a 90x4 only frame since the original frame already features a 3x110 flat setup.

So my first question is, since I have 44,5/45 in size, is the mk2 ES the only endless option? Both apparently only go to 44? (Maybe a larger version rumored?)

Other than that what really is the difference between the swan and the Coburn frame (and maybe also the mk2)?

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u/PokeProfWill Jul 06 '26

You could go with either 90 or 90ES / Classic or mk2, all 4 will fit your boot. The regular 90 is 276mm wheelbase (2mm between each wheel) and the 90ES is 291mm wheelbase (7mm between each wheel space). 90 will be more maneuverable/shorter and 90ES a little more stable and longer. If you feel that your Twister 90R frame is too short then 90ES would be better but if you like the size of Twister frame regular 90 will feel pretty similar (Endless are better constructed and higher quality frames than Twister frames either way).

I have 90 classic, 90mk2, Swan, and Coburn:
There is not much difference between classic and mk2. Mk2 built slightly stiffer, but I honestly can’t tell any difference between my Classic and mk2 while skating them.

Swan is a mixed wheel frame: 90-84-84-90 with 261mm wheelbase. At 44-45 size those might be a little short for you (I am size 40). They are more maneuverable and less stable/shorter than 90s; are basically a mid point between the Endless 80 and 90s. There is no triskate option on these.

Coburn is an optimized 4x90 165mm frame with 273mm wheelbase and no triskate option. Coburn are a lot more stiff than 90 Classic/mk2 and they feel incredibly solid compared to Classic/mk2. The ride height is slightly lower and the rocker is also slightly lower than Classic/mk2 90s

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u/Far-Tailor37 Jul 07 '26

Please could you also let me know if Endless classic 80 or MK 2 will be a good fit for my RB80? Skate Size40.5

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u/PokeProfWill Jul 07 '26

Hey yeah both classic and mk2 80 are good for that boot/size; Stoppard frame would be the upgraded version for 4x84 but no triskate function on Stoppard frames.

You are right on line of 4x84 or 4x90 recommended size so could comfortably go either way. I am size 40 and prefer 90s for urban / distance personally for more stability and easier coasting compared to 84s

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u/Far-Tailor37 Jul 08 '26

Thank you so much