Very light, great value for money and with a new faster-engaging titanium freehub body.

Standard cup and cone bearings with fat seals mean a long life and easy serviceability - plus a pack of bearings will cost about a quid from any local shop, no need to order in expensive sealed units.

Shimano say:

"The new XTR rear hubs offer improved performance any rider will appreciate. A quicker engaging freehub body, improved durability and increased rigidity are included in a disc & non-disc XTR rear hub."

Features           

• Angular contact (cup-and-cone) bearings and oversize alloy axles for increased wheel rigidity, precision bearing adjustment and easy maintenance
• New freehub body design for quicker pawl engagement (more than 125% faster compared to older model)
• New seal design Improves seal performance by 400%  
• Center Lock rotor mount system (6-bolt adapters are available)

Front Centerlock hub:
holes: 32
weight: 145g
Q/R XTR included - 57g

Rear Centerlock hub:
holes: 32
weight: 272g
Q/R XTR included - 62g