Да. Вот у меня второй случай, видимо.))
Втулка -- белая DT240, изначально была под 135*10 труболт (как будто вилсет разобрали какой-то стоковый, но не уверен).
Manes, чем выше, тем лучше, но на самом деле по фиг и даже abec 1 сгодится.
In the world of bearings there are in fact two different quality ratings being used. The type that a lot of people have heard of is the ABEC scale. The ABEC scale starts at ABEC 1, and jumps in increments of 2, so ABEC 3, 5, 7 etc. Usually bicycles are fitted with ABEC 1 Bearings when they are built in the factory at original equipment level, as in the main Bicycles parts do not necessitate an ultra precise engineered part (when compared to medical equipment for instance).
The ABEC rating does have it's limitations though. Reason being ABEC refers to how precise the fit, play and tolerance is between the balls and races. There are many more specification details to a bearing, so buying purely on the ABEC scale can result in a poor bearing from a material, seal and grease perspective.
The other specification quality rating used on Bearings is a standard called EMQ. This stands for 'Electric Motor Quality' – this has derived from the need for bearings on electric motors used in harsh environmental conditions to have a much more stringent criteria to meet – which takes into consideration Grease, Noise, Material Grade, Tolerances/Precision, Seal Type etc.
ABEC 5 bearings by Enduro Bearings come with high precision balls that are within 5/1,000,000" round. These are military level specification, used for precision equipment. R-64 hardness, of the highest grade. Vacuum de-gassing process for the purest chromium alloy steel, hardened to R62, extremely tough and very durable.
Nylon with graphite retainers are virtually frictionless while providing constant lubrication with Rheolube 374A grease.
Вроде хороши для втулок и по цене всего 8,36 евро
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