As mentioned before, the re-spacering of the rear wheel has an additional challenge:

• the cogset must fit between frame and rear wheel;
• the rim must run centered between the chainstays;
• the rear dropout must not be bent apart or tilted.

That means: No frame modifications are accepted, I fear a crack in the stays.

The original condition fits in with too much force... not good

First attempt: The rim is *not* centered between the chainstays

After checking it with a caliper and recalculating the distances it turned out as follows:

Left side: 4mm bushing and nut taken from the front wheel

Right side: 8mm bushing and nut: The cogset fits perfectly

The rear dropout width is 120mm and the re-spacered axle now has 122mm. Good.

Next chapter: The bottom bracket