Features: Material: Made of aluminium alloy material, which is high strength, anti-rust, non-deformation and durable. Front Hub Adapter: This front 15mm boost hub adpater allows 100mm*15mm front hub convert into 110mm*15mm. Rear Hub Adapter: The rear 12mm boost hub adpater allows 142mm*12mm front hub convert into 148mm*12mm. Package Includes: This set includes 1pc x hub conversion adapter,2pcs x spacer and 6pcs x bolts. Easy Use: Comes with necessary accessories, easy to install and convenient to use. Specifications: Item Type: Bicycle Hub Conversion Adapter Material: Aluminium Alloy Color: Red, Black Fitment For: This front 15mm boost hub adpater allows 100mm*15mm front hub convert into 110mm*15mm; The rear 12mm boost hub adpater allows 142mm*12mm front hub convert into 148mm*12mm Hub Conversion Adapter Size: 3mm: About 44 x 3mm/1.73 x 0.12inch, 5mm: About 44 x 5mm/1.73 x 0.2inch Spacer Size(Outer Dia. x H): 3mm: About 18.9 x 3mm/0.74 x 0.12inch, 5mm: About 21 x 5mm/0.83 x 0.2inch Bolts Size(Dia. x H): About 9.9 x 17.4mm/0.39 x 0.69inch Package Includes: 1Pc x Hub Conversion Adapter 2Pcs x Spacer 6Pcs x Bolts Notes: Transition: 1cm=10mm=0.39inch 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement.

D.L. Whitley (comprador verificado) –
Works awesome! Great problem solver!
Works awesome! Great problem solver!
survivalist (comprador verificado) –
Gets the job done.
This is the exact size you need to space over a regular front hub to be boost spacing. I used it in my Cannondale lefty hub that I took off an old 26 bike and used this to adapt it to a modern 27.5 boost frame.
HolyShoot (comprador verificado) –
Perfect for Surron
Needed the 5mm extension for the front tire on a Surron to prevent the front brake caliper from rubbing on the tire on a fork and tire upgrade. Worked perfectly.This is not plastic. It’s aluminum. So if you like to eat car or bike parts, and you prefer plastic, this isn’t for you.
Missy (comprador verificado) –
It’s perfect!
If you guys are wondering this fit on my surron perfectly it came with the extra longer screws that you need to put it on. It’s ALUMINUM! Not plastic like the other reviews said. It came in about 2 days. Don’t listen to other people that did a review, this is aluminum definitely will be buying again if I need another one in the future!
Seth (comprador verificado) –
Exactly what is needed for non-boost wheel on boost fork
This allowed me to run a very nice non boost wheel on my boost fork. Exactly what I needed
Sherri (comprador verificado) –
Good Price!
Worked great! Good price ($7) and shipped to me in 2 days. Allowed me to run a non-boost front wheel on the aftermarket RockShox boost front fork I had.
Amazon Customer (comprador verificado) –
These are front hub spacers, not rear hub.
These are front spacer for 15mm axles to add 5mm to each side of a 100mm hub to get 110mm. This does not contain any rear hub spacers for 12mm axles, even though they are pictured.
E. May (comprador verificado) –
gets the job done, very affordable
does what it’s supposed to do