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rapshee
50cc nipper
Joined: 19 Feb 2014
Posts: 12
Location: Barossa valley SA
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 Posted: Fri Jul 25, 2014 10:48 pm Post subject: sand wheel diameter |
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Howdy all,
Have done a couple of trips now with the qrasa and have noticed that everyone seems to be running a higher profile tyre than stock.
I would like some extra clearance for the dunes but not sure how the higher profile tyre will affect my gearing (banshee And a 350 raptor).
Can someone please advise if it is worth going up a tyre profile and if I will have to change gearing.
And if you can advise what profile tyre that would be awesome.
Thanks in advance. |
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Sponsor
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HaggLE
Roostin Away
Joined: 16 Mar 2009
Posts: 511
Location: Newcastle
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| Posted: Sat Jul 26, 2014 8:11 am Post subject: |
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It's about the drive you get in the sand rather than ground clearance. Balloon shape tyres give the best grip in sand. Down side is they aren't too stable in turns. Anything with a soft carcass will give good drive in sand and less spin.
Turf tamers are good all rounders
http://www.titantirestore.com/turf-tamer-atv-tires.html
These give best straight line sand traction but lots of roll in corners
http://www.bikebandit.com/tires-tubes/motorcycle-tires/duro-hf240-atv-tire
If you do change diameter you can calculate what sprockets you need to maintain the same gearing. 1 axle revolution take you a certain distance, work out the difference between them and you can work out what sprockets you need. |
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driftingbanshee
Blaster class
Joined: 15 Oct 2013
Posts: 185
Location: Central Coast
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| Posted: Sat Jul 26, 2014 8:01 pm Post subject: |
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everyone that i know and run with run 20x10-9 or 20x11-9 out in the dunes. I run the same on both of my bikes and have no issues at all with clearance on a banshee and ltr
banshee comes factory with 20x10-9
LTR comes with 18x10-8 (which now has 20s on it)
ive found anything that is 2ply is awesome on the beach. Balloon only seems to work if you have paddles. My balloon duros are FARRRKED on the beach so i opted for a set of 20-11-9 Kenda XCR. Nice and falt and grip great on the soft sand but they are 6ply
if you are going for a paddle get a balloon type
if you are avoiding a paddle get something flat like razr/kendra etc. Also try and get a 2ply if you can. Ulitmate tire on the beach that isnt a paddle is the KT335 2ply (which are hard to get) |
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rapshee
50cc nipper
Joined: 19 Feb 2014
Posts: 12
Location: Barossa valley SA
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| Posted: Sun Jul 27, 2014 10:20 pm Post subject: |
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| Thanks fellas for the replies. |
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bullet
The Day Starts With OZATV !
Joined: 09 Sep 2006
Posts: 1518
Location: Middleton SA
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| Posted: Mon Jul 28, 2014 10:08 am Post subject: |
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As mentioned above, 20 inch turf tamers are excellent all rounders for sand.
Balloon tyres or anything with a rounded shoulder work best, and the turfies are flat across the tread area but with a rounded shoulder.
They drive remarkably well in sand for such a tight tread pattern and they still have a sport tyre feel that can be thrown sideways easily.
Choosing a tyre is always a matter of compromise on how you are going to ride the sand (your riding attitude).
For less experienced riders who want to avoid getting bogged, the taller sidewalls of a 21 or 22 inch rear are better.
Lisa runs a 22 inch Mudlite AT on an 8 inch beadlock. They are the closest thing that you can get to sand paddle performance without feeling like you are riding on 50 cent pieces on hard-pack.
I like to play harder so I go for a 21 inch GNCC rear.
We both race sand enduro's a lot so it is important not to have the smallest diameter rear tyre in the field. Which is why we run 21 and 22 inch rears.
Train tracks in damp sand can get very deep and the slightly larger size just helps keep your chain out of the sand a bit more.
I'll try to get a pic of the ITP Mudlite 22's, you can get them for a 8, 9 or 10 inch rear rim, but the '8 inch rim tyre is actually the lightest combination. Highly recommended.
If you want to dance around on the rev limiter, do a lot of jumps and get a lot more sideways... go for the turfies in a 20.
PS... be careful not to chose a tyre just for the diameter written on the sidewall. Tyre manufacturers vary a lot in 'real' size which makes it very difficult.
I have seen a 20 inch and a 22 inch tyre side by side and they were the identical height with the same pressure.
That is 2 inches difference! up to 1 inch difference is very common.
So don't get a 'small' 20 that measures a real 19 inches.
...And if you do change your gearing too much, don't worry a simple 1 tooth change on the front sprocket will fix it.
_________________
Can-Am X Team
Bullet #Y12. MrsB #Y18.
Last edited by bullet on Mon Jul 28, 2014 10:26 am; edited 1 time in total |
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bullet
The Day Starts With OZATV !
Joined: 09 Sep 2006
Posts: 1518
Location: Middleton SA
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| Posted: Mon Jul 28, 2014 10:19 am Post subject: |
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Mudlite AT 22x11x8 run at 2-3.5psi for sand depending on sand, rider weight and type of riding.
_________________
Can-Am X Team
Bullet #Y12. MrsB #Y18. |
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rapshee
50cc nipper
Joined: 19 Feb 2014
Posts: 12
Location: Barossa valley SA
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| Posted: Mon Jul 28, 2014 7:43 pm Post subject: |
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Thanks bullet, very informative post.
I could not believe how deep the "train tracks" where at Peake last week end, and it is what prompted me to make this post.
Also some of the properties we go to are hard packed but have a hump in the centre of the track. Not much fun when your rear wheels are of the ground.. |
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