I've had that conversation with someone (triathlete) about a year after they launched the new RED. "My gears are slipping" 'Your inner chainring is really badly worn and chain wear is waaay past 1%' "oh ....I've only done 8k on it" (seemingly without ever cleaning it) 'and it's one piece with the outer ring and power meter.....but SRAM do a trade in service at 50% discount' "oh that is a relief I thought it was going to be expensive!!" 'Well the original price is £800, so it's still £400 plus a chain and a cassette at £350 and labour' It...