pr60 is for front? and trail series is for rear?

 

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u are confused. u should talk to the dynatrac rep on here. u can do a 60 in the front or the rear. the "prorock" is the housing. it can be upgraded on a trail series as well. so, u can get a trail series axle with the prorock60 housing. the trail series is priced better because there are less options u can choose on it, but if u buy a trail series with the prorock housing it is the same as a prorock60. if u want full float or other options the trail series is not for u.