Good tyre for dirt but useless on astro. the only tyre's i've heard will work on astro is fastrax kourse kings and schumacher mini spike/mini pin.
When building the thrust race for the diff go careful not to over tighten as the washer will shatter, also if you have an M3 TAP it's worth cutting threads into the long step screws for the steering assembly as the heads can shear off before they reach there stop point. If theres anything i can help with let me know.
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