I have the 29 hurricane right now, weighed it ready to travel...16,500... front 5960 and 10,600 rear... the 18 only has 500lb more springs in the front , and 1000 in the rear...that being 7000 on the front and 12000 on the rear...as yours is 6500 front and 11000 rear... the 6500 front springs ride better... so what I would look for is wear on the rear snubber and how close it is...doing the sumos on the rear net a better stable ride... helper springs or adding a leaf make it stiff.... do sumo's and put them to the rear of the axel and it'll ride and corner like a dream.... the sumo's are a progressive durometer , you'll probley have to use 7'' bags, but check first, and go with the 8'' if you can... use the yellow bags...try to set it up with about 3/4'' preload or close...
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