maybe some of you have been in a similar situation. you buy an old bike off cl and the seller has put a new pair of cheap tires in the bike to help his sale. so ive got a beat up old 1987 schwinn voyageur with almost new 27" 1.25 cheap kenda tires. orig. i bought the bike for parts, it is a little big, my ideal size is 56 and it is 58 but i quickly found i can stand over it (no extra room) and ride it ok. so i put fenders on it and decided its my rain bike because its got the fenders, it is beatup but works, and i dont like it so much since fit isnt ideal and its got cheap tires and i dont want to throw money into it. but now im thinking maybe ifcits raining and im riding at night with cars on the road maybe this isnt the best safest setup. just considering these kenda 15 or 20 dollar tires, dont know exact model, they havent flatted, they arent terrible but my pasela tg tires feel better. there arent too many quality 27" tires. maybe id be somewhat safer in rain on scwhalbe marathon tires. generally question is what do u do with cheap new tires u get with bikes? do u ride them? i got a sequia with some cheap 700c 25mm chinese tires but getting rid of those was an easy choice because one blew up when i experimented to see if could take 120psi instead of max 100 on sidewall, and the other one got flats easy.

Modern 27" tires often have higher max pressure ratings than they did back in the day. If you're running old steel rims, it takes a lot of care to achieve those pressures, and it's usually wiser to use a little less air, as long as you're avoiding pinch flats.

I have some 700x45mm tires and considering 37mm.

I've used those tires before.. They are heavy, numb, and offer little in flat protection. That said, for a bar bike or something, perfect.