Home»WHEELS HUBS TYRES & BEARINGS»Hubs»PRIMO 9's 3 Spoke Hubs 3.75/4 x 2.5 Inch»PRIMO 3 Spoke Composite Hub 3.75/4x 2.5 Inch

PRIMO's 3 Spoke Composite Hub has a center set bearing position & because of its special '3.75/4 Inch Rim' means it is capable of fitting both 3.75 Inch Rim Tyres (8 Inch Tyres) & 4 Inch Rim Tyres (9 inch Tyres). 

 The 3 Spoke PRIMO hubs are assembled using just 3 heavy duty M6 x 30mm Stainless Steel Socket capped Bolts & M6 Nylock nuts. The Composite hub is very Strong but a bit Chunky. IMO its best fitted with 9 Inch Tyres or Any tyre using a 4 inch Rim.

Because of the extra size of this hub it is strong ebough for many applicatuons. When comparing the weight to the super slim design of the PHATLADS hubs (weighing just 184g), the PRIMO 3 Spoke hub weighing 282g does weigh in a little on the heavy side, but the 3 spoke'd solid structure is a timeless classic with an awesome reputation for not letting you down & is currently the only option hub that TRAMPA offers should you wish to mount 'Center-Set 9 inch Wheels'

Although slightly tighter to fit into than other hubs, TRAMPA's regular 28mm Bearings will fit perfectly into the Bearing housing of the PRIMO hub. As a top tip place the bearings in the freezer for 30 minutes before inserting them into the hub, the cold will cause the metal of the bearing to shrink & fit easier into the hub!

To fit the PRIMO 3 spoke hubs onto the TRAMPA TRUCKS you will need a special 12x 9.5mm Axle Spacer to allow the hub to position onto the axle correctly.

Bearings can be purchased at a discounted price when purchased with Hubs.

M6 x 30mm Socket Capped Allen-Key Bolt for primo hub - Marine Grade Stainless steel

TRAMPA's M6 x 30mm Socket Capped Bolt is made using A4 Marine Grade Stainless Steel. This Bolt is used to assemble the PRIMO 3 Spoke Hubs. The socket capped head of the Bolt screws neatly though the HUB eventually screwing into the Marine Grade Stainless Steel M6 Nylock Nut on the other side of the hub. 

Weighing just 8 grams each, these Bolts are lightweight, look very sexy & are totally non corrosive. Using Marine Grade Stainless Steel, means these Bolts will never rust on you! They can cope with the most harsh of weather conditions & they laugh in the face of sandy/salty beaches or muddy freeride tracks, which do turn other manufacturers nuts & bolts into corrosive rusting wrecks! As well as being Non Corrosive all of the TRAMPA Bolts are diped in BLUE THREAD LOCKING PASTE to ensure an extra strong secure fix between the Nut & the Bolt.

You’ll will need a 5mm Allen Key  to tighten & loosen the Bolt from the nut. Ensure all your Nuts & Bolts are tight before riding!

M6 Nut - Marine Grade Stainless steel Nylock Nut - Fixes Bindings & Trucks to Deck

Introducing TRAMPA's M6 (6mm Thread) A4 Grade Marine Grade Stainless steel Nylock Nut. This Nylock Nut will fit to all M6 Bolts regardless of their length. This A4 Marine Grade Stainless Steel Nut will never rust on you! It is fitted with the world renowned NYLOCK System (Nylock is a nylon locking system where Nylon is pasted into the threads of the nut so that when the bolt is tightened into the nut the nylon grabs the thread of the bolt holding it locking it in the thread ensuring things do not vibrate loose or fall off when being ridden on rough terrain like that which a Mountain or Kiteboard endures. The NYLOCK System is fitted as standard to all TRAMPA Nuts. 

This Nut is used to fix to the Regular shaped M6 Bolts that hold the TRUCKS to the DECK for the HOLYPRO Decks & also for the countersunk bolts connecting the L BRACKETS TO the DECKs. Use an 10mm spanner or SOCKET for a Ratchet Driver to tighten the Nut onto the Bolt. Always ensure your Nuts & Bolts are tight before you ride!

PRIMO 3 spoke Hub - Fits the 9 inch stiker tyre

PRIMO's 3 Spoke Composite Hub has a center set bearing position & because of its special '3.75/4 Inch Rim' means it is capable of fitting both 3.75 Inch Rim Tyres (8 Inch Tyres) & 4 Inch Rim Tyres (9 inch Tyres). 

 The 3 Spoke PRIMO hubs are assembled using just 3 heavy duty M6 x 30mm Stainless Steel Socket capped Bolts & M6 Nylock nuts. The Composite hub is very Strong but a bit Chunky. IMO its best fitted with 9 Inch Tyres or Any tyre using a 4 inch Rim.

Because of the extra size of this hub it is strong ebough for many applicatuons. When comparing the weight to the super slim design of the PHATLADS hubs (weighing just 184g), the PRIMO 3 Spoke hub weighing 282g does weigh in a little on the heavy side, but the 3 spoke'd solid structure is a timeless classic with an awesome reputation for not letting you down & is currently the only option hub that TRAMPA offers should you wish to mount 'Center-Set 9 inch Wheels'

Although slightly tighter to fit into than other hubs, TRAMPA's regular 28mm Bearings will fit perfectly into the Bearing housing of the PRIMO hub. As a top tip place the bearings in the freezer for 30 minutes before inserting them into the hub, the cold will cause the metal of the bearing to shrink & fit easier into the hub!

To fit the PRIMO 3 spoke hubs onto the TRAMPA TRUCKS you will need a special 12x 9.5mm Axle Spacer to allow the hub to position onto the axle correctly.

Bearings can be purchased at a discounted price when purchased with Hubs.