I wanted lightweight wheels for my backpack/travelpack as I was going to be spending a lot of time on train stations.
Nothing seemed to meet my idea of something easy to stow as well as being easy to install and remove.
These wheels are easy to make, and can be quickly added or removed when required. The eyelet bolts are permanently fixed but are small enough not to get caught up when not in use.
Step 1: Materials Part1
Begin with a pair of small wheels (these are 75mm in diameter and have bearings), light weight rod 200mm wider than base of backpack for the axle (I used donated stainless steel rod from a lighting shop - check the wheels will fit), a packet of small R Clips, and a small length of tubing to use as a spacer on the axle.
You will also need Eyebolts - see step 4
Step 2: Axle
Drill a small hole about 5mm from one end of the rod. This can be tricky so be patient to avoid marking the steel rod. Don't cut the rod yet.
Step 3: Testing the Axle
Place the wheel on the rod and hold in place with the R Clip.
Step 4: Materials Part 2
You will need two eyebolts which hold the axle neatly, and you will also need extra (locking) nuts and washers.