Hi there, I'm new to the forum so firstly hello. I'm Jamie, I'm 17 stone and want to get fit , back to cycling after a nasty off nearly 9 months ago, been using the bike once a day for around a week now doing 8 ish miles. I have done 8 miles urban riding in 34 mins, at a comfortable pace. and 8 miles of hills and back lanes @ 49 mins, again at a comfortable pace. This Sunday I plan to cycle to the Ponderosa Cafe in Llangothlen North wales, a distance of 25 miles (to the cafe,getting a lift back LOL)... the cafe is 1800ft above seal level, some nasty climbs ect, never done more than around 10 miles urban/semi steep hills before so not sure how I will get on when faced with bigger climbs and for longer distances, I know the distance is nothing to most of you guys but to me it's a long way so bear with me, maybe one day I will be a better rider. This will be furthest journey via cycle bike, this will be no city type ride in the park, there is some BIG hills. (or so there seems?) Any advice/ tips will be great, I'm on my dads old mountain bike with road tyres (no suspension), I have access to a road cycle bike but 1. I have never road one , 2. the seat post is to short for me, and 3. I think the gears on the mountain bike will be better for the hills ? What psi for the tyres? after reading a website it says as much as 120 psi ..... I thought it would be around 30 odd? There is around 10 miles of bigger hills, and 15 miles of mild slopes and flat ground btw. Thanks for reading and any tips ect will be great help. will get a picture of the bike tomorrow.