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Diamondback Men's Mason 27.5" Bike

With a lightweight dual suspension alloy Strong box frame makes the Diamondback Mason 27.5" perfect for smoother rides even on bumpy terrain. The Mason has 18 speeds, and you can change between them with the sturdy Shimano thumb shifters, while the front and rear disc brakes and 160mm rotors provide ample breaking reliability and performance every time.

$ 329.00
or 4 payments of AUD $82.25 with Buy now with afterpay
Available for orders over $79 and under $1,200  more info
or 4 payments of AUD $82.25 with Buy now with afterpay
Available for orders over $79 and under $1,200  more info

Find your bike

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Product Features:

  • Men's bike with 27.5"/ 68.75cm wheels
  • Front and rear brakes with 160mm rotors
  • 18 Speed gearing with Shimano thumb shifters
  • Lightweight dual suspension alloy Strong Box frame
  • 3 Piece crank - 170mm
  • Diamondback alloy rims
  • 2.1"/5.25cm thick tyres
  • Brand Name
  • Article Number

Home Delivery

For most items we charge a flat delivery fee per order as listed below:

LocationCost Per Order*
Metro areas$9.90
Regional areas$13.90
Remote areas$15.90

For bulky orders or orders containing large or fragile items we charge a delivery fee based on the delivery destination and your items. The cost of delivery will be displayed in your shopping cart once a delivery address has been entered.

Delivery Time Frames*

The below standard delivery time frames apply to all online orders:

Location Delivery Time Frames*
Metro areas 4 - 6 business days
Regional areas 6 - 8 business days
Remote areas 8 - 9 business days

After your order has been shipped you will receive an email informing you of your parcel’s consignment number and the carrier it is shipping with.

Please note that these are estimates only. If your order is more than 10 days late please email us at onlineorders@bigw.com.au.


Pre-ordered items are delivered in accordance with the advertised delivery time frames.

Authority to leave

At the checkout you may grant the carrier authority to leave some goods at the delivery address even if unattended. However, please note that neither BIG W nor the carrier will be liable for loss or theft of the goods and the goods will be left at your risk. In addition, the carrier retains the discretion not to leave the goods unattended, including where the carrier deems it to be unsafe to do so.

Re-delivery Fees

Please note that should the order be unable to be delivered to or left at the delivery address, a re-delivery fee of $25 may apply (particularly in respect of bulky orders).

Warranty, Return & Refunds Policy

We understand that sometimes you may wish to return a product you have purchased. So we have set out here our Warranty, Return and Refund Policy for our products.

Contact Us

If you have any queries or your order is more than 10 days late please email us at onlineorders@bigw.com.au