Polygon Tambora A Series – Conquer Every Road
The Polygon Tambora A Series redefines versatility, blending speed, control, and durability for riders who demand more from their gravel bike. Whether you're tackling fast-rolling terrain, rugged backroads, or long-haul adventures, the Tambora A is built to perform.
A lightweight carbon frame delivers enhanced responsiveness and efficiency, making it ideal for riders looking to push their limits. Paired with Shimano GRX for consistent, precise performance across any surface.
Key Features:
| frame | ALX XC TRAIL FRAME |
| fork | Carbon Rigid |
| steerer | TAPER 1-1/8" TO 1-1/2" |
| front derailleur | SHIMANO GRX FD-RX810 11-SPEED |
| rear derailleur | SHIMANO GRX RD-RX810 11-SPEED |
| cassette | SHIMANO HG700 11-SPEED 11-34T |
| chain | KMC X11 |
| shifting lever | SHIMANO GRX ST-RX600 11-SPEED BRIFTER |
| brakes | SHIMANO GRX RX-600 |
| brake lever | SHIMANO ST-RX600 |
| brake set | SHIMANO BR-RX400 |
| rotor | SHIMANO SLX SM-RT70 160mm |
| crankset | PRAXIS ALBA GR M30 48-32T, 170mm |
| saddle | FIZIK TERRA ARGO X7, ø 7mm Rail |
| seatpost | CARBON, 27.2 x 400mm, 0mm offset |
| bottom bracket | PRAXIS T47 M30 |
| bb interface | THREADED T47 86.5mm |
| hub spacing | 12x142mm FOR TA M12x1 164mm |
| head tube i.d. | 52/52mm |
| brake route | INTERNAL |
| shifter route | INTERNAL |
| handlebar | POLYGON EXPERT - 420mm (S, M) / 440mm (L, XL), 31.8mm, 125mm rise, 77mm bend |
| stem | POLYGON EXPERT - 80mm (S, M) / 90mm (L, XL), 31.8mm, 7mm rise |
| tyres | MAXXIS RE-FUSE 700X32C |
| maximum tyre size | 700X35C |
| wheels | ALLOY DOUBLE WALL 32H |
| rims | ALLOY DOUBLE WALL FV H - 20 622 32H TLR |
| spokes | STAINLESS 14G NDS - 290 & DS - 292 W/ NIPPLE BRASS |
| front hub | NOVATEC D791SB 12x100mm 32H CL |
| rear hub | NOVATEC D792 12x142mm 32H CL FOR SPROCKET |
| headset | TOKEN TK155SP-36 W/ SEALED BEARING EXTRAS, IS 52/28.6 | IS 52/40 |
| dropout | UDH (UNIVERSAL DERAILLEUR HANGER) |
| sizes (ct) | S, M, L, XL |
| Frame Material | Carbon |
| Fork Material | Carbon |
| Groupset Brand | Shimano |
| Groupset Model | GRX |
| Shifting Type | Mechanical |
| Pedals Included | No |
| Drivetrain Gearing | 2 x 11 |
| Ride Style | Gravel |
| FRAME | ALX XC TRAIL FRAME |
| Fork | Carbon Rigid |
| Steerer | TAPER 1-1/8" TO 1-1/2" |
| Front Derailleur | SHIMANO GRX FD-RX810 11-SPEED |
| Rear Derailleur | SHIMANO GRX RD-RX810 11-SPEED |
| Cassette | SHIMANO HG700 11-SPEED 11-34T |
| Chain | KMC X11 |
| SHIFTING LEVER | SHIMANO GRX ST-RX600 11-SPEED BRIFTER |
| BRAKES | SHIMANO GRX RX-600 |
| Brake lever | SHIMANO ST-RX600 |
| BRAKE SET | SHIMANO BR-RX400 |
| Rotor | SHIMANO SLX SM-RT70 160mm |
| Crankset | PRAXIS ALBA GR M30 48-32T, 170mm |
| Saddle | FIZIK TERRA ARGO X7, ø 7mm Rail |
| Seatpost | CARBON, 27.2 x 400mm, 0mm offset |
| Bottom Bracket | PRAXIS T47 M30 |
| BB INTERFACE | THREADED T47 86.5mm |
| Hub Spacing | 12x142mm FOR TA M12x1 164mm |
| HEAD TUBE I.D. | 52/52mm |
| Brake Route | INTERNAL |
| SHIFTER ROUTE | INTERNAL |
| Handlebar | POLYGON EXPERT - 420mm (S, M) / 440mm (L, XL), 31.8mm, 125mm rise, 77mm bend |
| Stem | POLYGON EXPERT - 80mm (S, M) / 90mm (L, XL), 31.8mm, 7mm rise |
| TYRES | MAXXIS RE-FUSE 700X32C |
| Maximum tyre size | 700X35C |
| Wheels | ALLOY DOUBLE WALL 32H |
| RIMS | ALLOY DOUBLE WALL FV H - 20 622 32H TLR |
| SPOKES | STAINLESS 14G NDS - 290 & DS - 292 W/ NIPPLE BRASS |
| FRONT HUB | NOVATEC D791SB 12x100mm 32H CL |
| REAR HUB | NOVATEC D792 12x142mm 32H CL FOR SPROCKET |
| Headset | TOKEN TK155SP-36 W/ SEALED BEARING EXTRAS, IS 52/28.6 | IS 52/40 |
| Dropout | UDH (UNIVERSAL DERAILLEUR HANGER) |
| SIZES (CT) | S, M, L, XL |
On all orders over $99 Evo Cycles offers free delivery to any non-rural address in New Zealand* - this includes large / bulky items and bike brands that are able to be shipped**
On orders under $99 we charge $6.99 fee for non-rural addresses and $11.99 for rural addresses. This is so we can give our customers (that's you!) the most competitive pricing available for small parts and accessories. There are no hidden shipping costs and you know exactly what you're paying for.
*There is an additional $5 charge for all rural deliveries.
Ordering a bike from Evo? If you choose the option Evo Home Delivery at the checkout your order will be personally delivered to you, by an Evo Crew Member, who will also be able to answer any questions you have about your new bike. If you choose Evo Delivery your bike will be delivered completely built, tuned and ready to ride! We are also able to offer Evo Home Delivery on previously restricted brands such as Giant & Trek!
Our home delivery charge is only $30 for 15km and $1 per km after that.
Free for all orders over $99. Orders under $99 a $6.99 flat shipping & handling fee applies. Order and pay online and collect everything from one of our showrooms. Just select which store you would like to collect from at checkout. Find out more about Click & Collect here.
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* All specifications listed are subject to change without notice. Please note that our specifications may be impacted by manufacturer component substitution changes caused by high global demand for bikes and resulting supply chain issues in the bike industry. We recommend confirming the specifications with your local Evo Cycles showroom if you have any questions.
Bike Weight: Many brands strive to list the lowest possible weight, but in reality weight can vary based on frame size, finish, hardware and accessories. The most accurate way to determine any bike's weight is to have your local showroom weigh it for you.
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