Originally Posted by
DaveSSS
Those rails marked MG are actually a high strength steel (easily confirmed with a magnet). They only add 10-15 grams of weight compared to the the more expensive Ti railed models. I've got Fizik Gobis with both types. Kium has to be a steel since it's also magnetic.
Could be just an alloy with a percentage of steel. Stainless steel can be magnetic.