mypa333

Hello fellow bikers,

I've recently bought an used Viking Roma Bike with 700c with 23c slick tires.

The road to work is not the best and I would need to fit bigger tires that would make the ride more comfortable and to stop hitting the rims, even if the tires are inflated.

So:
1. Can I buy new tires and tubes and up to which size and fit them on the original rims ?
2. What would be the maximum that I can fit?
3. If I need to change the rims, tyres and tubes completely, which should I go for, from your experience?

Thank you.

AlmostTrick

The limiting factor will be the frame, fork and brakes, not the rims. You need to measure the space there.

https://janheine.wordpress.com/2013/...ire-can-i-run/

leob1

1. Yes you can buy new tubes and tires. What size that fits on the rim depends on the width of the rim.
2. Depends on the frame and fork.
3. Mavic makes nice rims.

My advice would be for you to take your bike to the local bike shop, have them look at what you got, and recommend tires to fit your need.
Or you can begin by trying a set of 25's, is a small but noticeable difference.

fietsbob

+1, only you can measure the clearance distances available on Your Bike..

HillRider

The rims shouldn't be the problem as you can go up to at least 700-28 or perhaps 700-32 tires on what you have. The real limit may be your frame and fork clearance as many road bikes have tight clearances and won't fit larger tires. See haw much clearance you have with you current tires between the fork crown/brake arch in front and the brake bridge/seat stays/chain stays /brake bridge in back. That will tell you if larger tires are practical.

FastJake

Since you bought a road racing bike you will be limited in maximum tire width. The rims won't be an issue, the frame/fork will be. Next time you buy a bike make sure to figure out what size tires you want to run and make that a priority when shopping.

You can run a 32-35mm tire on even the narrowest road rims. But your frame/fork will not fit these. I'm guessing 28mm max on your bike. But possibly 25 or even 23 if it's as stupidly tight as some of the frames I've seen.

fietsbob

Its part of what has made sales of 'cross bikes' take off in sales popularity.. as the road/commuter bike with a wider tire capacity .

CafeVelo

I try not to run wider than 25mm on rims under 15mm for fear of pinch flats, but this is probably unnecessary

jimc101

That your getting the rim to impact the tarmac indicates that you haven't inflated the tires correctly.

Going on average weight & 23mm/700c tires, would be looking at 100psi f/r minimum.

For road surfaces, given you have a UK eBay link, you in the UK, live with it; UK roads are full of potholes, and you need to learn to ride round them/avoid rather then hitting them head on.

Delmarva

Yes, exactly. He may be running under inflated to soften the ride. Riding around works as does getting ones rear off the seat when riding over a rough patch.

Al1943

And you need to pump your tires up before each ride.

sch

Very strange and contradictory blurb when you read the description of the Viking bike in the ebay ad.
One thing that caught my eye was "frame... with mudguard clearance". If that is really the case then
the OP should be able to mount at least 28mm tires and possibly 32 but it might be a better idea
to mount the mudguards first, if used for commuting. Otherwise agree, tires not pumped up enough,
for the riders undisclosed weight.

From my experience with 'standard road brakes' a true 28mm wide tire will just barely fit width wise.
We had tire clearance problems on our tandem with nominal 25mm Pro2 Michelins which actually measured
28mm wide.