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Polygon Siskiu T7

Frame

ALX TRAIL 6061 ALUMINIUM, 135MM, UDH

Groupset

SHIMANO DEORE 1×12, 10-51T

Wheels

POLYGON MT6 ALLOY, TUBELESS READY

Use

Trail

Price range: AED7,499.00 through AED7,999.00

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29-inch full-suspension trail bike: ALX Trail aluminium frame with 135 mm rear travel and UDH, a 140 mm RockShox Recon Silver RL fork, Deluxe Select+ shock, Shimano Deore 1×12 (10–51T), Shimano 4-piston brakes, Maxxis Dissector tyres and an X-Fusion Manic dropper.

Candy Red and Blue are the current UDH model; Blue/Green and Grey are the 2022 build.

Description

140 / 135 mm

Fork / rear travel

1×12

Shimano Deore, 10–51T

4-piston

Shimano MT420 brakes

UDH

Universal derailleur hanger

The Polygon Siskiu T7 is a 29-inch full-suspension trail bike: an ALX Trail aluminium frame with 135 mm of rear travel, a 140 mm RockShox Recon Silver RL fork and a RockShox Deluxe Select+ shock. The current version adds UDH compatibility, a reinforced rear triangle, brazed-in internal cable ports and a top-tube accessory mount, with a 64.5° head angle and longer reach for a calmer ride when the trail points down.

It is built to be one bike for every kind of trail riding, from climbing the Hatta trail network to technical sections at Showka in Ras Al Khaimah or after-work laps at Mushrif Park, with Shimano Deore 1×12 gearing, Shimano 4-piston brakes, Maxxis Dissector tyres and an X-Fusion Manic dropper post.

Good to know

Two model years: Candy Red and Blue are the current UDH model (29″ wheels, sizes S–XL). Blue/Green and Grey are the 2022 model; see below.
Sizing: choose by rider height in the size guide. Between sizes? Message us your height and inseam.
Included: alloy flat pedals with replaceable pins and a dropper post (UDH model).
Tubeless ready: hookless Polygon MT6 rims with Maxxis Dissector EXO+ tyres.

What makes it work

RockShox Recon Silver RL fork

140 mm of Solo Air travel with rebound and compression-to-lock adjustment, 32 mm stanchions and a Boost 15×110 mm Maxle Stealth axle.

RockShox Deluxe Select+ shock on the Polygon Siskiu T7

Deluxe Select+ rear shock

A DebonAir spring with a larger volume spacer for a progressive feel, rebound adjustment and a two-position compression lever for climbs.

Shimano Deore 1x12 drivetrain on the Polygon Siskiu T7

Shimano Deore 1×12

A 10–51T MicroSpline cassette with Hyperglide+ shifting under load, a 32T chainring and the SL-M6100 trigger shifter.

Shimano MT420 4-piston brake on the Polygon Siskiu T7

Shimano 4-piston brakes

BR-MT420 four-piston hydraulic calipers on 180 mm Center Lock rotors, front and rear.

One-piece linkage on the Polygon Siskiu T7

One-piece linkage, UDH frame

A unibody pivot bridge drives the 135 mm rear end. UDH, ISCG 05 tabs, a threaded bottom bracket and room for 29×2.60″ tyres.

Polygon Siskiu T7 in Candy Red on a dirt trail

Wheels, tyres and dropper

Hookless Polygon MT6 rims (29 mm internal) with Maxxis Dissector 29×2.40″ EXO+ tyres, and an X-Fusion Manic dropper with 150 or 170 mm travel by size.

Two model years on this page

The colour you choose decides the build. Candy Red and Blue (Polygon calls it Candy Teal) are the current UDH model described above. Blue/Green and Grey are the 2022 Siskiu T7: 27.5″ (S, M) or 29″ (M, L, XL) wheels, a RockShox Recon RL fork (150 mm on 27.5″, 140 mm on 29″), Tektro HD-M735 brakes, Entity XL2 wheels, Performance 2.40″ tyres, a 65–65.5° head angle and no UDH. 2022 rider heights: S 155–165 cm, M 165–175 cm, L 175–185 cm, XL 185–196 cm. The Information tab lists both builds, labelled.

Size guide (UDH model)

Size	Rider height	Reach	Stack	Seat tube	Dropper
S	157–168 cm (5′2″–5′6″)	440 mm	604 mm	390 mm	150 mm
M	168–178 cm (5′6″–5′10″)	465 mm	609 mm	400 mm	150 mm
L	178–185 cm (5′10″–6′1″)	485 mm	622 mm	415 mm	170 mm
XL	185–196 cm (6′1″–6′5″)	505 mm	636 mm	430 mm	170 mm

Rider heights are Polygon’s. Reach and stack are frame measurements in millimetres.

Full geometry, UDH model

mm	S	M	L	XL
Stack (A)	604	609	622	636
Reach (B)	440	465	485	505
Head tube angle (C)	64.5°	64.5°	64.5°	64.5°
Head tube length (D)	89	95	110	125
Seat tube angle (E)	71.2°	71.2°	71.2°	71.2°
Effective seat tube angle	77°	77°	76°	77°
Seat tube length (F)	390	400	415	430
Effective top tube (G)	568	595	619	644
BB height (H)	337.5	337.5	337.5	337.5
BB drop (I)	39	39	39	39
Chainstay (J)	430	430	432	430
Wheelbase (K)	1186	1214	1240	1267
Standover (L)	704	705	711	723
Front / rear travel	140 / 135	140 / 135	140 / 135	140 / 135
Dropper travel	150	150	170	170
Handlebar width	780	780	780	780
Stem length	35	35	35	35

Who it is for

Trail riders who want one bike that climbs efficiently (shock compression lever, fork lockout) and stays composed on rough descents.
Riders stepping up from a hardtail such as the Polygon Xtrada 6.
Riders who want room to grow: a UDH rear end, ISCG 05 tabs and clearance for 29×2.60″ tyres.

Full specifications are listed in the Information tab.

Polygon’s parts list gives 170 mm cranks on the UDH model, while its geometry chart lists 165 mm for every size; ask us to check a specific bike. The 15.4 kg weight is Polygon’s figure for size M with a tubeless setup. Not published: maximum rider weight, and the complete-bike weight of the 2022 model.

Questions people ask

Which size should I choose?

Use the rider-height ranges in the size guide. If you sit between two sizes, the smaller frame feels livelier and the larger one more stable at speed. Send us your height and inseam on WhatsApp and we will confirm.

What is the difference between Candy Red/Blue and Blue/Green/Grey?

Candy Red and Blue are the current UDH model on 29-inch wheels with a RockShox Recon Silver RL fork, Shimano MT420 4-piston brakes and Maxxis Dissector tyres. Blue/Green and Grey are the 2022 model with Tektro brakes, Entity wheels and 27.5- or 29-inch wheels depending on size. Both builds are listed in the Information tab.

What does UDH mean?

UDH is SRAM’s Universal Derailleur Hanger, one hanger shape shared by many frame brands. A replacement is easy to find if you bend one on the trail, and the frame is ready for drivetrains that mount directly to the UDH interface.

How much suspension travel does it have?

140 mm at the front from the RockShox Recon Silver RL fork and 135 mm at the rear from the Deluxe Select+ shock (UDH model).

Can I run it tubeless?

Yes. The Polygon MT6 rims are hookless and the Maxxis Dissector EXO+ tyres are tubeless ready; Polygon’s 15.4 kg weight (size M) is with a tubeless setup. We stock sealant and valves if you want to convert.

What is the widest tyre that fits?

Polygon lists a maximum tyre size of 29 x 2.60 inches for the UDH frame.

Talk to us

WhatsApp +971 50 254 5363 · info@bikeera.com

Information

Weight	22.00 kg
Dimensions	158 × 26 × 87 cm
Color	Blue, Blue/Green, Charcoal, Grey, Red
Size	L, M, S, XL
Wheel Size	27.5″, 29″
Brand	Polygon
Bike Type	Dual Suspension
Frame Material	Aluminium (AL)
Product Type	Full-suspension trail mountain bike
Model Year	Current UDH model: Candy Red, Blue (Candy Teal), 2022 model: Blue/Green, Grey
Manufacturer Code	AIFPX29ST7 (UDH model), AITPX27ST7 / AITPX29ST7 (2022 model)
Frame	ALX Trail 6061 aluminium, 29″, UDH compatible, brazed-in cable ports, accessory mount, one-piece unibody pivot bridge, post-mount brake, 148×12 mm Boost thru-axle, threaded BB, ISCG 05 tabs, 34.9 mm seat clamp (UDH model), ALX Trail aluminium, tapered head tube (2022 model)
Suspension Travel	140 mm front / 135 mm rear (UDH model), 150 / 140 mm (27.5″) or 140 / 135 mm (29″) (2022 model)
Fork	RockShox Recon Silver RL, 140 mm, Solo Air, rebound, compression to lock, tapered, Boost 15×110 mm Maxle Stealth (UDH model), RockShox Recon RL, Boost 15×110 mm, 150 mm (27.5″) / 140 mm (29″) (2022 model)
Rear Shock	RockShox Deluxe Select+, DebonAir, rebound, 2-position compression, 210×55 mm, M8x25 mm hardware (UDH model), RockShox Deluxe Select+, special tune, 210×55 mm, 8×25 mm hardware (2022 model)
Headset	FSA No.57E, ZS44/28.6 top, ZS56/40 bottom (UDH model), Zero stack ZS44/28.6 top, ZS56/40 bottom (2022 model)
Rear Derailleur	Shimano Deore RD-M6100-SGS, 12-speed (UDH model), Shimano Deore RD-M6100, 12-speed (2022 model)
Shifter	Shimano Deore SL-M6100, 1×12-speed trigger
Crankset	Shimano FC-M6120-1 Boost, 32T (max 34T) (UDH model), Shimano FC-MT510-1 Boost, 32T, 170 mm (S, M) / 175 mm (L, XL) (2022 model)
Cassette	Shimano Deore CS-M6100-12, 10–51T, 12-speed, MicroSpline
Chain	KMC X12, 12-speed
Bottom Bracket	Threaded (UDH model), BSA threaded (2022 model)
Brakes	Shimano BR-MT420, 4-piston hydraulic disc, front and rear (UDH model), Tektro HD-M735 hydraulic disc (2022 model)
Rotors	Shimano SM-RT54, 180 mm, Center Lock
Front Hub	Shimano HB-TC500-15-B, 15×110 mm Boost, 32H, Center Lock (UDH model)
Rear Hub	Shimano FH-MT400-B, 12×148 mm Boost, 32H, Center Lock, MicroSpline (UDH model)
Rims	Polygon MT6 alloy, 29 mm internal, 32H, hookless, tubeless ready (UDH model), Entity XL2 Disc, 584-35 (27.5″) / 622-35 (29″) (2022 model)
Tyres	Maxxis Dissector 29×2.40″, foldable, 60 TPI, 3C MaxxTerra, EXO+, tubeless ready (UDH model), Performance, 27.5×2.40″ / 29×2.40″ (2022 model)
Max Tyre Size	29×2.60″ (UDH model)
Handlebar	Polygon Expert alloy, 780 mm, 30 mm rise, 9° backsweep, 35 mm clamp (UDH model), Entity Xpert alloy, 780 mm, 20 mm rise, 35 mm clamp (2022 model)
Stem	Polygon Expert, 35 mm, 0° rise, 35 mm clamp (UDH model), Entity Xpert alloy, 35 mm, 7°, 35 mm clamp (2022 model)
Grips	LINC rubber, 134 mm (UDH model)
Saddle	LINC Xtend, Cr-Mo rails (UDH model), Entity Xtend (2022 model)
Seatpost	X-Fusion Manic LC dropper, 150 mm (S, M) / 170 mm (L, XL), 30.9 mm (UDH model), Dropper post, 150 mm (S, M) / 170 mm (L, XL) (2022 model)
Pedals	Alloy flat pedals with replaceable pins (UDH model)
Head Tube Angle	64.5° (UDH model), 65° (27.5″) / 65.5° (29″) (2022 model)
Bike Weight	15.4 kg (33.95 lb), size M, tubeless setup (UDH model)

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About brand

Bikeera stocks the full Polygon bikes UAE lineup — road, mountain, gravel, and electric models for every rider. Polygon delivers performance-focused design at accessible price points, with builds that compete at the highest levels. As one of Bikeera's core brands, Polygon comes with expert team support and a deep in-store range. The Helios road series features UCI-approved carbon frames and top-tier groupsets including Shimano Dura-Ace Di2 and SRAM RED AXS. Tambora gravel bikes run from aluminium entry builds to full carbon e-gravel options, covering road speed and trail versatility. The Siskiu and Collosus mountain lines tackle everything from XC trail riding to enduro with progressive full suspension geometry. Polygon's Syncline and Collosus electric models pair Bosch and Shimano motors with capable trail-ready frames. Shop Polygon bikes UAE at Bikeera in-store in Dubai or browse the complete collection at bikeera.com. Spare parts and accessories round out the Polygon range. Free delivery across the UAE on orders over AED 150.

New to the brand or comparing models? Read our Polygon Bikes UAE guide for help choosing, or visit our Umm Suqeim St showroom for a test ride.