@Venom121212 did you not try 9"?
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I’ve tried both. And like both. In the UK 9" is good for winter but don’t have the use in summer. On rough and loose stuff they are great.
8" is also good and noticeably lighter. You can always do 9" rear 8" front too.
I didn’t have any real issues with jumping. My PP is me jumping on 9" wouldn’t have been able to make that jump on the 8" I have as it was wet and slippery
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I pretty much run 9" exclusively now on my main board. The heavy wheels feel nice and locked in at speed. I don’t really notice a loss in snappiness but I did have to adjust bushings a bit. @rusins is pretty spot on
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I got l-faster tires. They’ve been great, not 100% perfect on balance but pretty good.
9 inch tires do feel huge tho and are significantly heavier and less maneuverable than 8’s
8’s are great for most Offroad but I get so much clearance on 9’s I find I can go faster with em
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imo 9’s feel way better. but i hate having the extra weight especially on the front.
pkp- 8’s only
channel- vary on the terrain/ weather i’ll be riding in
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Ah this is all great feedback! thanks dudes!
I thought I was gonna get a bunch of anti-9 inch propaganda, but your opinions are super helpful.
This is pretty much exactly the intended use case! I don’t have any real desire to get airborne.
I assume these two statements kinda relate to each other? I’m definitely going with the airs, so curious as to why you think they should only run 8 in Jack? Is it because the pkps become significantly harder to manoeuvre on 9s?
I assume these are the ones you are talking about? which ones do you use @Venom121212 ? Kinda not so much concerned about balance as I am about hard compound / longevity.
Given that I’m gonna have the undermount battery and also need a 10mm riser in the front already to compensate for the split angles in the deck, I think 9 inch is the clear winner. I am a little concerned about the weight, but when my only previous mtb experience is Madness, I think I’m probably gonna be ok with the weight on a 2wd build with a much smaller battery 
manoeuvrability is also a concern, but not a deal breaker, I think for what I will gain with the bigger tires, will be a fair trade off here.
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Yep, they used to be cheaper though.
They are quite a hard compound and seem to have a good amount of durability. I think Justin would agree
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100% agreeance on all points. I love the shinier/harder compounds, especially on larger tires. I’ve ordered 4 sets of them (increased price is annoying) and they’ve all been balanced enough for me not to notice or add weights. The added weight and size does suck a bit for popping the front end up but I can truck through the grass and woods going so much faster than with 8". The bump steer doesn’t feel as noticeable either but that could just be me.
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My 9" tires are fine on Apex airs at the back of my board. It’s the front where I had an RKP truck where they were an issue, but I switched to Newbee RTKP and it’s fine again
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Love my 9’s on my Airs for the most part. Must be a Trampa problem 
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Not trampas lol. same geometry as airs tho.
pkps on 8s are as compfy as channels on 9s which is like riding a cloud. and using a ‘cushy’ truck with cushy tyres makes it feel too spongy for me (i like to be able to hard hit an edge and slide on tarmac)
also those ali 9" tyres are amazing 44mph and no balancing issues, ~2k commuting miles and still got grip, low pressure makes them soft and there huge. mine were 235mm dia and on deep dish megastars were wide af. they used to be around £10 tho
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thanks, good input.
I’m definitely gonna start with 9s and see how I go. I think i’ll start with MBS tires and tubes on the new XL rockstars, and maybe then try out those l faster ones later.
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