i two have found that the 22 loves new tyres fastrax turff gripers all round when new all the grip you could wont but after 4 batteries the rear were shot ok on the astro but on very worn grass useless good job the fastrax are only £5 i did try a set of yellow mini pins but found them to have to much grip on the astro and not enuff on the grass so will be running mini spikes on my car indoor on carpet i run mini pins all round and slam the car on the deck
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