Size Guide
Description
YOUR RIDE, YOUR RULES
The perfect full-suspension mountain bike for riders of all levels. Whether you're new to the sport or seeking a playful and efficient bike, the Siskiu D delivers. With 120mm of travel, a durable frame, and modern geometry, it effortlessly handles everything from cross-country loops to flowy descents, providing a confident and enjoyable ride for all.
VALUE MEETS PERFORMANCE
The Siskiu D is designed to conquer climbs with its wide-range 1x drivetrain and efficient pedaling platform. It's also equipped with a dropper post for added maneuverability on the descents, giving you confidence on the descents. With quality air suspension and modern geometry, the Siskiu D delivers a capable and affordable ride.
A TRUSTED BRAND
Polygon is a factory-direct brand with over 30 years of experience crafting high-performance bikes at competitive prices. Vertically integrated manufacturing ensures quality and cost savings. Their mountain bikes have been tested on the world stage at events like Redbull Rampage and the World Cup circuit, boasting a 5-year frame warranty for peace of mind.
INDUSTRY REVIEWS
"Whether you're just getting into the sport or upgrading to your first full-suspension bike, we feel this is one of the best values out there. The Siskiu D7 performs much better than we expected, with a slick aluminum frame, modern trail riding geometry, and quality components like a dropper post—all at a budget-friendly price."
ROCKSHOX RECON FORK
One of the most underrated performers in the RockShox range. It packs a massive punch with its air spring design, 120mm travel, adjustable rebound, and compression dials for fine-tuning.
ROCKSHOX DELUXE SELECT+ SHOCK
The DebonAir air spring offers easy air adjustment to match rider weight and riding style and impressive suppleness. It features external rebound and compression adjustment for on-the-fly fine-tuning, and the ability to tune progression with volume spacers.
SHIMANO CUES 1X11 DRIVETRAIN
Boasting a massive 11-50T cassette, rivalling the range of many 1x12 systems. Enjoy the simplicity and reduced weight of a 1x setup, plus smoother shifting and improved chain retention compared to traditional 2x drivetrains.
ONE-PIECE LINK
Sometimes simple is better! The linkage-actuated single pivot offers active and progressive suspension making for a supple ride on technical sections and a playful ride on flow trails, while the one-piece pivot bridge reduces flex and saves weight.
DROPPER POST
Featuring 150mm of drop for smaller frames and 170mm for larger frames, a dropper post allows riders to quickly lower their saddle for improved maneuverability and control on descents.
Specifications
Build
| Frame | ALX XC Trail 6061 Aluminium Frame, One Piece Linkage Suspension Platform |
|---|---|
| Fork | Rockshox Recon Silver RL, Air Spring, Travel:120mm, Lockout, Rebound Adjust, 15x110mm |
| Rear Shock | Rockshox Deluxe Select Plus, Air Spring, Lockout, Rebound Adjust, E2E 190x45mm, M8x25mm Hardware |
| Handlebars | Polygon Expert Alloy, 780mm |
| Stem | Polygon Expert, Alloy 40mm |
| Pedals | MTB |
| Saddle | Linc Void Saddle, Steel 7mm |
| Seatpost | Tranz X Dropper 150mm |
Groupset
| Cassette | Shimano CUES CS-LG400 11-50T 11-Speed |
|---|---|
| Chain | KMC XGLIDE |
| Brakes | Shimano MT201 Hydraulic Disc Brake, 180mm Rotor front / 160mm rear |
| Rear Derailleur | Shimano CUES RD-U6000-GS Direct Attach 11-Speed |
| Front Derailleur | NA |
| Shifters | Shimano CUES SL-U6000-11R 11-Speed Trigger |
| Crankset | Prowheel RMZ-MD25S-TT Two-Piece-Crank, Crank Length: 170mm (S, M) / 175mm (L, XL) |
Wheels
| Rims | Alloy Double Wall, 30mm Internal Width, Tubeless Ready |
|---|---|
| Tyres | WTB Trail Boss COMP, Wire Bead, 27.5x2.25 / 29x2.25 |
| Rear Hubs | Shimano FH-TC500-HM Thru-Axle 12X148mm 32H Center Lock |
We reserve the right to modify product specifications and details without prior notification.
Geometry
| Size | Medium (27.5) | Medium (29) | Extra Large | Small | Large |
|---|---|---|---|---|---|
| Top Tube Length | 595 | 603 | 646 | 572 | 624 |
| Seat Tube Length | 435 | 435 | 522 | 395 | 487 |
| Head Tube Length | 105 | 102 | 122 | 102 | 112 |
| Seat Tube Angle | 70 | 68 | 68 | 70 | 68 |
| Head Tube Angle | 65 | 65.5 | 65.5 | 65 | 65.5 |
| RC Length | 432 | 436 | 436 | 432 | 436 |
| Stack | 580 | 607 | 625 | 571 | 616 |
Length measurements are provided in millimeters and degrees, unless specified otherwise.
Size Guide
| Size | Range (cm) | Range (ft & in) |
|---|---|---|
| Extra Large | 188 - 196 | 6'2" - 6'5" |
| Medium 27.5 | 168 - 177 | 5'6" - 5'10" |
| Medium 29er | 171 - 180 | 5'7" - 5'11" |
| Small | 155 - 168 | 5'1" - 5'6" |
| Large | 180 - 188 | 5'11" - 6'2" |
If you are outside of the size range or unsure of the best fit, give us a call and we'll help get you on the right bike.
Assembly
Explore our series of how-to video guides designed to walk you through every stage of assembling and fine-tuning your new Polygon Siskiu D7 - Mountain Bike. Whether you watch the entire series or focus on specific tasks, we've got you covered. Our dedicated Customer Service team is here to offer expert advice and ensure your bike is ready for the road.
How to: Unbox Your Bike
Learn how to safely unpack and assemble your new bicycle.
How to: Install the Seatpost
Step-by-step guide on fitting and securing the seatpost on your bike frame.
How to: Inflate Tires
Properly inflate your bicycle tires to the recommended pressure for a smooth ride.
How to: Install A-Head Handlebars
Mount A-Head handlebars and align them properly.
How to: Adjust Disc Brakes
Fine-tune and align disc brakes for optimal braking performance.
How to: Install Pedals
Correctly attach pedals to the crank arms of your bike.
How to: Install Quick-Release Wheels
Attach and secure wheels with quick-release mechanisms.
How to: Adjust a Rear Derailleur
Adjust the rear derailleur for smooth gear shifting.
How to: Quickly Fit Your Bike
Tips for a basic bike fit to ensure comfort and efficiency.
Planning to assemble at home? Remember to install the pedals with care. Make sure to align them square and gently tighten to avoid stripping the threads.
Description
Specifications
Geometry
Size Guide
Assembly
YOUR RIDE, YOUR RULES
The perfect full-suspension mountain bike for riders of all levels. Whether you're new to the sport or seeking a playful and efficient bike, the Siskiu D delivers. With 120mm of travel, a durable frame, and modern geometry, it effortlessly handles everything from cross-country loops to flowy descents, providing a confident and enjoyable ride for all.
VALUE MEETS PERFORMANCE
The Siskiu D is designed to conquer climbs with its wide-range 1x drivetrain and efficient pedaling platform. It's also equipped with a dropper post for added maneuverability on the descents, giving you confidence on the descents. With quality air suspension and modern geometry, the Siskiu D delivers a capable and affordable ride.
A TRUSTED BRAND
Polygon is a factory-direct brand with over 30 years of experience crafting high-performance bikes at competitive prices. Vertically integrated manufacturing ensures quality and cost savings. Their mountain bikes have been tested on the world stage at events like Redbull Rampage and the World Cup circuit, boasting a 5-year frame warranty for peace of mind.
INDUSTRY REVIEWS
"Whether you're just getting into the sport or upgrading to your first full-suspension bike, we feel this is one of the best values out there. The Siskiu D7 performs much better than we expected, with a slick aluminum frame, modern trail riding geometry, and quality components like a dropper post—all at a budget-friendly price."
ROCKSHOX RECON FORK
One of the most underrated performers in the RockShox range. It packs a massive punch with its air spring design, 120mm travel, adjustable rebound, and compression dials for fine-tuning.
ROCKSHOX DELUXE SELECT+ SHOCK
The DebonAir air spring offers easy air adjustment to match rider weight and riding style and impressive suppleness. It features external rebound and compression adjustment for on-the-fly fine-tuning, and the ability to tune progression with volume spacers.
SHIMANO CUES 1X11 DRIVETRAIN
Boasting a massive 11-50T cassette, rivalling the range of many 1x12 systems. Enjoy the simplicity and reduced weight of a 1x setup, plus smoother shifting and improved chain retention compared to traditional 2x drivetrains.
ONE-PIECE LINK
Sometimes simple is better! The linkage-actuated single pivot offers active and progressive suspension making for a supple ride on technical sections and a playful ride on flow trails, while the one-piece pivot bridge reduces flex and saves weight.
DROPPER POST
Featuring 150mm of drop for smaller frames and 170mm for larger frames, a dropper post allows riders to quickly lower their saddle for improved maneuverability and control on descents.
Build
| Frame | ALX XC Trail 6061 Aluminium Frame, One Piece Linkage Suspension Platform |
|---|---|
| Fork | Rockshox Recon Silver RL, Air Spring, Travel:120mm, Lockout, Rebound Adjust, 15x110mm |
| Rear Shock | Rockshox Deluxe Select Plus, Air Spring, Lockout, Rebound Adjust, E2E 190x45mm, M8x25mm Hardware |
| Handlebars | Polygon Expert Alloy, 780mm |
| Stem | Polygon Expert, Alloy 40mm |
| Pedals | MTB |
| Saddle | Linc Void Saddle, Steel 7mm |
| Seatpost | Tranz X Dropper 150mm |
Groupset
| Cassette | Shimano CUES CS-LG400 11-50T 11-Speed |
|---|---|
| Chain | KMC XGLIDE |
| Brakes | Shimano MT201 Hydraulic Disc Brake, 180mm Rotor front / 160mm rear |
| Rear Derailleur | Shimano CUES RD-U6000-GS Direct Attach 11-Speed |
| Front Derailleur | NA |
| Shifters | Shimano CUES SL-U6000-11R 11-Speed Trigger |
| Crankset | Prowheel RMZ-MD25S-TT Two-Piece-Crank, Crank Length: 170mm (S, M) / 175mm (L, XL) |
Wheels
| Rims | Alloy Double Wall, 30mm Internal Width, Tubeless Ready |
|---|---|
| Tyres | WTB Trail Boss COMP, Wire Bead, 27.5x2.25 / 29x2.25 |
| Rear Hubs | Shimano FH-TC500-HM Thru-Axle 12X148mm 32H Center Lock |
We reserve the right to modify product specifications and details without prior notification.
| Size | Medium (27.5) | Medium (29) | Extra Large | Small | Large |
|---|---|---|---|---|---|
| Top Tube Length | 595 | 603 | 646 | 572 | 624 |
| Seat Tube Length | 435 | 435 | 522 | 395 | 487 |
| Head Tube Length | 105 | 102 | 122 | 102 | 112 |
| Seat Tube Angle | 70 | 68 | 68 | 70 | 68 |
| Head Tube Angle | 65 | 65.5 | 65.5 | 65 | 65.5 |
| RC Length | 432 | 436 | 436 | 432 | 436 |
| Stack | 580 | 607 | 625 | 571 | 616 |
Length measurements are provided in millimeters and degrees, unless specified otherwise.
| Size | Range (cm) | Range (ft & in) |
|---|---|---|
| Extra Large | 188 - 196 | 6'2" - 6'5" |
| Medium 27.5 | 168 - 177 | 5'6" - 5'10" |
| Medium 29er | 171 - 180 | 5'7" - 5'11" |
| Small | 155 - 168 | 5'1" - 5'6" |
| Large | 180 - 188 | 5'11" - 6'2" |
If you are outside of the size range or unsure of the best fit, give us a call and we'll help get you on the right bike.
| Size | Age | Range (cm) | Range (ft & in) |
|---|---|---|---|
| 12" (Balance) | 2 - 4 | 80 - 100 | 2'6" - 3'1" |
| 16" | 4 - 7 | 100 - 120 | 3'4" - 4'0" |
| 20" | 7 - 9 | 120 - 135 | 4'0" - 4'5" |
| 24" | 9 - 11 | 135 - 145 | 4'5" - 4'9" |
If you are outside of the size range or unsure of the right fit for you, give us a call or come in and visit your local store to talk about your best options.
Explore our series of how-to video guides designed to walk you through every stage of assembling and fine-tuning your new Polygon Siskiu D7 - Mountain Bike. Whether you watch the entire series or focus on specific tasks, we've got you covered. Our dedicated Customer Service team is here to offer expert advice and ensure your bike is ready for the road.
How to: Unbox Your Bike
Learn how to safely unpack and assemble your new bicycle.
How to: Install the Seatpost
Step-by-step guide on fitting and securing the seatpost on your bike frame.
How to: Inflate Tires
Properly inflate your bicycle tires to the recommended pressure for a smooth ride.
How to: Install A-Head Handlebars
Mount A-Head handlebars and align them properly.
How to: Adjust Disc Brakes
Fine-tune and align disc brakes for optimal braking performance.
How to: Install Pedals
Correctly attach pedals to the crank arms of your bike.
How to: Install Quick-Release Wheels
Attach and secure wheels with quick-release mechanisms.
How to: Adjust a Rear Derailleur
Adjust the rear derailleur for smooth gear shifting.
How to: Quickly Fit Your Bike
Tips for a basic bike fit to ensure comfort and efficiency.
Planning to assemble at home? Remember to install the pedals with care. Make sure to align them square and gently tighten to avoid stripping the threads.
- Reviews
- Questions
Good, but for one small detail
Finally got a chance to get out for my first ride on the new D7. It arrived really quickly, no complaints there at all. Such a nice change riding a dual suspension bike after being on a hard tail. My only small complaint is that the chain just won't go all the way into the largest chain ring. Would have been nice to have the gears working perfectly straight out of the box. Apart from that, really happy with the new purchase and looking forward to tackling some more trails in the near future.
