why do you HAVE to glue ur tires onto the rims.. whataout when ur tires abs or pvc tires wear out? u ahve to replace the rim too? and are wheels fairly simple to change? can u do it in like 5 mins? or do u have to change them ahead of time because u have to take many things apart? imt hining of either geting a Hpi Spring, Rally, or TL-01.