Polygon Siskiu T UDH Trail Mountain Bike Range 2025
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Time to read 9 min
Table of Content
The Trail Slayer - Polygon Siskiu T0 UDH
The Siskiu T0 is the pinnacle of the T-Series lineup. It comes fully loaded with premium components, including a Fox 36 Float Factory fork with Kashima coating and the advanced GRIP X2 damper for unmatched tunability. A full Shimano Deore XT 1x12 drivetrain and XT 4-piston brakes deliver precise shifting and stopping power, while premium XT hubs on Polygon MT9 rims roll smoothly over any terrain. This build provides professional-level performance, control, and confidence on the most demanding trails.
The Next-Level Charger - Polygon Siskiu T9 UDH
The Siskiu T9 steps up trail performance with a stiff Fox 36 Float Performance fork and a Fox Float X Performance shock, offering superior damping on descents. Its high-precision drivetrain combines Shimano Deore XT shifting with durable SLX/Deore 1x12 components, paired with powerful Deore 4-piston brakes for confident stopping power. Built on the reinforced ALX frame with UDH, the T9 delivers exceptional control and stability for aggressive trail riding.
The All-Rounder - Polygon Siskiu T8 UDH
The Siskiu T8 steps up with a Fox 34 Float Rhythm fork, Float DPS rear shock, and a Shimano SLX 1×12 drivetrain running on Microspline hubs. Its UDH-ready ALX frame, progressive 140/135 mm suspension, modern geometry, and Maxxis tires provide the speed, control, and confidence to push harder on any trail.
The Trail Hustler - Polygon Siskiu T7 UDH
The Siskiu T7 steps up with a RockShox Recon Silver RL fork, Deluxe Select+ rear shock, and a Shimano Deore 1×12 drivetrain on Microspline hubs. Its reinforced ALX frame, UDH compatibility, and progressive 140/135 mm suspension with updated geometry deliver the speed, control, and confidence needed to tackle any trail.
The Budget Beast - Polygon Siskiu T6 UDH
The Siskiu T6 features a RockShox Recon Silver RL fork, X-Fusion O2 Pro R rear shock, and a Shimano CUES 1×10 drivetrain. Its reinforced ALX frame, UDH compatibility, and progressive 140/135 mm suspension provide the control, stability, and comfort to ride all day with confidence.
The Complete Siskiu T Range: From T0 to T6
The Siskiu T0 is the ultimate trail weapon, packed with premium Fox 36 Float Factory suspension, a GRIP X2 damper, Shimano Deore XT 1x12 drivetrain, and XT 4-piston brakes. Built for professional-level performance, it delivers unmatched control, precision, and confidence on the most demanding trails.
Stepping slightly down, the T9 balances high-end capability with accessible performance. A Fox 36 Float Performance fork and Float X Performance shock, combined with a precise Shimano Deore XT/SLX 1x12 drivetrain and Deore 4-piston brakes, give riders superior damping, control, and stability for aggressive trail riding.
The T8 is the versatile all-rounder. Featuring a Fox 34 Float Rhythm fork, Float DPS rear shock, and Shimano SLX 1×12 drivetrain, the UDH-ready ALX frame, progressive 140/135 mm suspension, modern geometry, and Maxxis tires make it perfect for riders seeking speed, control, and confidence across any trail.
The T7 is the dependable trail hustler. With a RockShox Recon Silver RL fork, Deluxe Select+ rear shock, and Shimano Deore 1×12 drivetrain, its reinforced ALX frame, UDH compatibility, and progressive suspension allow riders to tackle trails with speed and control, all at a very approachable price.
Finally, the T6 is the budget-friendly beast. Equipped with a RockShox Recon Silver RL fork, X-Fusion O2 Pro R rear shock, and Shimano CUES 1×10 drivetrain, it offers the stability, control, and comfort to ride all day, proving that even entry-level riders can enjoy the thrill of the trail.
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How Much Does Shipping Cost?
Parts & Accessories Small Parcels Bikes & Bulky Items Standard Shipping Free Over $149 orders $12.
What Is BikesOnline's Return Policy?
30-Day Parts & Accessories Easy Returns
At BikesOnline, we understand that sometimes your needs or preferences might change. That's why we've crafted a 30 day easy return and exchange policy specifically for our parts and accessories (P&A). Our goal is to ensure your complete satisfaction with your purchase, and we want to make the process as straightforward as possible. See Terms & Conditions >>

Free Bike Return Terms & Conditions
- The Free 30-day Bike Return is applicable to all bikes at BikesOnline and begins from the date of delivery. Just let us know within 30 calendar days from delivery if you'd like to return the bike.
- Feel free to unpack and assemble the bike for sizing and inspection purposes. However, we kindly request that you refrain from test rides to avoid any wear and tear. Failure to comply with these terms or returning bikes in anything less than "as new" condition may result in a minimum restocking fee of $50 or even void the right to a refund. (see examples below).
- If your bike arrived damaged, please report it as soon as possible. Snap some photos of the damage and email them to us via our contact form.
- Make sure to securely pack the bike in its original packaging when returning it. This includes the frame, wheels, and components. Hang on to the packaging just in case. How to pack a bicycle and box it for transport and travel
- You'll need to be present on the scheduled pickup day to hand the bike to the courier.
- If we attempt a pickup and it's unsuccessful due to the item not being ready, we incur a re-booking fee. We can arrange another pickup on your behalf, but any additional fees will need to be passed on to you, which may be deducted from your total refund.
- Damage resulting from improper use, policy abuse, or incorrect assembly, such as damaged pedal threads, tire dirt, frame scratches, or any other damages, will be charged at full retail rates. (see examples below).
- If the bike sustains damage during the return transit due to inadequate packaging by the customer, we reserve the right to charge you the cost of replacing the damaged part or component. Be sure to check out our repacking guide.
- Refunds will be processed after one of our mechanics thoroughly inspects the returned bike. Please understand that this process may take up to 5 business days after the bike is received.
- Refunds will be issued promptly once the bike receives approval from our mechanics. In the rare case of an issue during inspection, we'll contact you regarding policy violations and fees. Please note that some banks may take up to 10 business days to finalize the transaction after we issue the refund. The refund for the bike does not include any shipping costs associated with your original transaction. However, the return shipping within our 30-day policy is on the house.
What will result in a restocking fee:
- Scuffs, scratches and signs of excessive use on components and frames
- Signs of excessive drivetrain wear
- Bikes ridden in adverse weather and not returned in like-new conditions
- Bikes showing damage to the frame or other components
- Bikes incorrectly or insufficiently packaged
- Damage incurred in the return shipping due to improper packaging

Bike Return FAQ
What If You Want to Keep Your Bike?
No need to worry! Just keep riding! Beyond the free 30-day return period, your bike is still covered by the BikesOnline consumer guarantee.
What If You Received a Damaged Bike in Transit?
If you've received a bike that's been damaged in transit, please snap some photos of the damage and send them to us via our contact form.
What If You Received a Bike with an Issue?
We're sorry to hear you're having trouble, especially with your brand new bike. We're here to assist, and the sooner we know about it, the better. Please reach out to us via our contact form.
To help us help you, provide us with:
- A quick explanation of the issue with your product.
- Your order or invoice number.
- Photos or videos of the issue.
With these details, we'll swing into action to get you back on your bike, whether you're hitting the road or the trails, as quickly as possible. Your satisfaction is our top priority!
Do I Get a Refund for the Initial Shipping Cost?
While we're happy to cover the return shipping and pickup costs, please note that the initial shipping cost will not be refunded.
How Is the Bike Picked Up from My Address?
We'll coordinate the pickup of your packaged bike for free. We'll work with you to schedule a convenient pickup date at your designated address. To ensure a smooth process, be present on the scheduled date to hand the bike over to our courier. We recommend giving our carrier, a call on the morning of the pickup to get an estimated time of arrival.
What About My Accessories?
Our standard returns policy applies to unused accessories. You can check out our Refund & Exchange Policy.
When Will I Get My Refund?
Refunds will be processed after one of our mechanics thoroughly inspects the returned bike
30-Day Parts & Accessories Easy Returns Terms & Conditions
Conditions of return
- Goods can be returned within 30 days of delivery and must be in the original packaging as new - no signs of installation, damage or wear, tags (if present) still attached.
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Must be in original packaging which is not damaged as new condition, not ripped, torn, stickers or tape.
- If an item has been deemed or used upon its return, we will contact you directly. We will be asking for the shipping fee to be covered to get the used item back to you.
- We have a dedicated "no return" Bib short, Chamios and Swimwear/Wetsuits policy due to hygiene reasons, ensuring customers receive new, clean, and hygienic products with every purchase.
- Please inform us via email here, before you send an item back to us to speed up the refund/exchange process.
- BikesOnline reserves the right to refuse any returned item without notice if we deem the return to not meet guidelines set upon creation of an RMA.
- Please allow up to 14 business days for return to be processed. All refunds will be provided via the original method of payment.
How will I be refunded?
- Refunds will only be issued via the original payment method made. Please refer to these links for how refunds are issued through PayPal, PayPal- Pay in 4 and Zip pay
- In the event that the original payment credit card has expired since time of purchase but the account remains active, funds will be transferred onto the updated credit card as your bank will process the transfer by identifying and matching your account number.
- In the event that your credit card and account are closed please assist us in arranging an alternate method.
How to return Parts & Accessories?
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Visit ParcelPoint to start your return and follow the prompts
- Please be aware that using ParcelPoint may result in return delays due to less frequent pickup schedules by their service partners. We recommend choosing this option if your return is not time sensitive or if an Aupstralia Post office is not conveniently accessible in your area.
- Fill in all the fields. You will need your original Order ID to book in your return. It starts with “N” followed by 5 digits, e.g. BO12345. You can find this number on your order or shipping confirmation email and also your invoice.
- Download and print your shipping label. Apply to your package once you have securely packed your items. Note: do not tape up or attach labels direct to the retail packaging.
- Drop off your parcel to any store offering ParcelPoint Returns (only if selected ParcelPoint), or to your nearest post office (only if selected Australian Post).
- In the return parcel, include your order number and whether you would like an exchange or refund.
- Return items to: BikesOnline Unit 13/25 Frenchs Forest Road E, Allambie Grove Business Park, Frenchs Forest, NSW, 2086
Tracking
- ParcelPoint: go to http://parcelpoint.com.au/track and use the ‘ParcelPoint ID’ to track your return. You find your ParcelPoint ID on your ParcelPoint returns slip.
- Australia Post: go to http://auspost.com.au/track and use the ‘Article Number’ to track your return. You find the ‘Article Number’ on your receipt.