I have apparently found an issue with the design. My seat is set in the back position and the top tube has worn through the plastic where the seat frame contacts the tube. When the large chain ring is used on the front and rear pressure is put on the top tube causing the chain to wear through the plastic exposing the chain and then rubbing on the metal seat bracket. This is a new issue and there is not a fix at this time. I found this when I removed the seat to wash the trike. I have 980 miles on my RAT as of Oct. 6. Check your top tubes for wear.
Comments
diy a rubber-lined hose clamp, secure it to the tube and hang it from the seat frame with a zip tie. maybe $1 to hang
Not going to spend $$ for an issue that should be fixed by TT!
TT doesn't recommend "cross chaining". You may have to raise the chain tube to avoid that but you don't have room under the seat.
Oh ok hey it's your trike do with it as you please.......even IF TT (the manufacturer) warns owners not to do it. I only suggest you remove the top tube, and go thru your gears and see how high the chain rides in the large/large combination. I won't be surprised it it hits the seat. just my opinion. Only been triking for a short time but biked and raced 34 years. best wishes.
This is the main issue. That was the first suggestion by TT, use only the small front sprocket. I think a real fix is needed for this issue.