Myself, I would be concerned about shortening the space between your wheel wells. Especially since your trailer does not have the lift kit. It is my opinion that the lift kit was an attempt to solve the damage problem that results from a blow out. If so, it had little positive effect. I do recommend the lift kit for raising your trailer another couple inches for better clearance. It can't help but benefit and should cost so few dollars.
Also, many TM owners have retrofit their wheel wells. It is a simple fix that has proven itself to prevent damage to the trailer. You are smart to do something but if it were me, I would do the retrofit. The total cost is about an hour per tire and approximately $25.00 for materials. The result will appear like a factory job and is difficult to see when completed. It should also take away little or no tire/fender clearance. If you would like to request a free copy of the plans, please send me a message at
[email protected]
Hal