The weight on the new Blackspire guide is 145g for the complete guide, it has an integrated Beavertail bash so there is no need for a bashring. Some of the first Blackspire guides that were prototyped back in 1995 used the same no moving parts technology but we didn't have the materials available to us back then that we do now so they we not ideal. There really is nothing new about this style of guide, it's been used on Motocross bikes for decades! PS: some euro brands have been making guides like the straitline for awhile ;)

Hey Dude... Not at Blackspire since I was 11... Just been working in the industry since I was. Got started wrenching bikes at a local shop to subsidize my bikes since as you can imagine at 11 yo it wasnt easy to afford $2k a year on bikes and racing! Been here at Blackspire for 10 years though! Yes, I do ride SFU quite often, mostly weekday evening rides. Weekends are on the shore or whistler ;)

Canajun! Or Canasian? MBUK rated it pretty low although its incredibly well designed beautifully machined. The bashring is too thin and bends. They claimed it dropped the chain frequently but that was likely a setup issue. And Blackspire DER guide is 30g LIGHTER eh!