I have one just like it. It's a pain in the **s to replace the front wheel. Stock axle is 5/16th so you'll have to do some filing to get a 9-mm axle in there. The front fork spacing is narrow too, 90mm ish. If it is Belgium built the bottom bracket should be 68mm english but the fork is almost certainly 26tpi Raleigh. So new fork = new headset.