Turbo Trainer- Jet Fluid Pro Setup?

Hoping that someone can help me with the setup.
I have had one go on it and struggled to last 35 minutes in sixth gear (Small chain ring and sixth cassette ring from the wheel), keeping a cadence of 90rpm. It seem's pretty tough to me which is contrary to other posts I have seen on this trainer. (Just to clarify, I am not super fit but not a couch potato either, so only managing sixth gear seems a bit odd!!)
When I locate the bike wheel in the trainer and compress the roller on to it, it appears to press the tire in by about 6mm. Is their any adjustability to this or not? You can obviously ride and turn the pedals, but to give you an idea of the resistance, if you were to turn the crank with your hand, you have to put quite a bit of effort in just to rotate it.
Looking forward to the responses.
I have had one go on it and struggled to last 35 minutes in sixth gear (Small chain ring and sixth cassette ring from the wheel), keeping a cadence of 90rpm. It seem's pretty tough to me which is contrary to other posts I have seen on this trainer. (Just to clarify, I am not super fit but not a couch potato either, so only managing sixth gear seems a bit odd!!)
When I locate the bike wheel in the trainer and compress the roller on to it, it appears to press the tire in by about 6mm. Is their any adjustability to this or not? You can obviously ride and turn the pedals, but to give you an idea of the resistance, if you were to turn the crank with your hand, you have to put quite a bit of effort in just to rotate it.
Looking forward to the responses.
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Posts
Seems reasonable. I'm out of ideas
I use a trainer tyre as I found that normal tyres break up and fill the room with a horrible rubber smell.
Many Thanks.