Bottom Bracket. Id go for a SKF - 300 (£43.00). I have one and had no trouble. There not too pricey. Bit cheaper than that Truvativ Gigapipe DH. (£35) Cranks Middle burns. They might me a tad expensive, but they are worth it. Life time warrenty and that (£155) Front disk. Avid with out a doubt. Easy to fit, cheap, piece opf piss to maintain. All you'll need is a cable and a lever (£63.00) Plus lever £11 for a Avid SD7 Lever Rear wheel. Just for messin about. Hope XC/Mono, or an Onza Ronnie rim, with spokes. Qoute from tarty is £103. posted But if you want a better hub Hope ProII £130 for the hub, but there really good hubs. £155 posted with Ronnie rims and Sapim Race spokes Cheapest = £367 Most Expensive = £427 You could get away with cheaper cranks, for example Tensiles. or echo. Rim you could get a Alex rim, there only £20, But have a look at www.tartybikes.co.uk, all them prices above are off there. Hope I helped!