road siklista
Join Date: Apr 2003
Location: Perlas ng Silanganan
Posts: 1,469
Bikes: Custom Knolly Chilcotin Limited Edition Orange, Dartmoor Wish, KHS 7500, Custom built Specialized Camber, S-Works Road, Cannondale Trail mtb, Polini MTB
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if it is raining hard, it is possible that water will sip in into your hubs, bottom bracket, headset, etc. This problem is specially true for lower-end group sets, but is not totally elliminated even on high-end groups.
You can always detect this by checking how smooth your wheel turns, etc...
If you detect abnormalities(higher resistance), you should lube this components. Bearings with no lubrication can heat-up and eat-away the casing, and vice versa.
Don't lube it using WD40 or other spray lube products, it will only dilute the grease(solid lubricant) and cause more damage.