Polygon · Mid-range gravel bike
Polygon Tambora A4
Take the longer route home, with tyres ready for the gravel detour.
Key facts
| Type | Gravel bike |
|---|---|
| Level | Mid-range — The sweet spot — clearly better parts without silly money. |
| Price (EU) | not sold |
| Price (US) | $1,800 at BikesOnline |
| Frame | Aluminium |
| Groupset | Shimano Grx |
| Gears | 2x11 |
| Sizes | S, M, L |
| Last checked |
What size Polygon Tambora A4 do I need?
A typical chart for gravel bikes — Polygon's own chart may differ slightly. Enter your height below and we'll pick the size.
| Size | Rider height | Inseam | Frame |
|---|---|---|---|
| XS | 150–160 cm · 4′11″–5′3″ | 68–74 cm · 27″–29″ | 49–50 cm |
| S | 158–168 cm · 5′2″–5′6″ | 72–78 cm · 28″–31″ | 51–52 cm |
| M | 167–178 cm · 5′6″–5′10″ | 77–83 cm · 30″–33″ | 54 cm |
| L | 177–186 cm · 5′10″–6′1″ | 82–87 cm · 32″–34″ | 56 cm |
| XL | 185–195 cm · 6′1″–6′5″ | 86–91 cm · 34″–36″ | 58 cm |
| XXL | 193–205 cm · 6′4″–6′9″ | 90–97 cm · 35″–38″ | 60–61 cm |
Alternatives to the Polygon Tambora A4
All gravel bikes →Grizl 6
Take the scenic shortcut when the tarmac gives up.
- Aluminium
- SRAM Apex XPLR
- 10.5 kg
Apollo Drop Bar Aluminium
Take the scenic shortcut when the tarmac gives up.
- Aluminium
- Shimano Alfine 11
- 10.9 kg
4130 All-Road SRAM Rival XPLR AXS
Take the longer route home, with tyres ready for the gravel detour.
- Steel
- SRAM Rival XPLR AXS
Polygon Tambora A4: FAQ
How much does the Polygon Tambora A4 cost?
About $1,800 (US). Prices change often, so check the retailer for the current price.
What size Polygon Tambora A4 do I need?
XS: 150–160 cm (4′11″–5′3″); S: 158–168 cm (5′2″–5′6″); M: 167–178 cm (5′6″–5′10″); L: 177–186 cm (5′10″–6′1″); XL: 185–195 cm (6′1″–6′5″); XXL: 193–205 cm (6′4″–6′9″). This is a typical chart for this type of bike — confirm with the brand's size chart. Between sizes: the smaller is more agile, the larger more stable.
Who is the Polygon Tambora A4 for?
It's a mid-range gravel bike: The sweet spot — clearly better parts without silly money. Gravel bikes are best for mixed rides on tarmac, gravel roads and forest paths, bikepacking and weekend adventures, one bike that can commute, train and explore.
What are alternatives to the Polygon Tambora A4?
Canyon Grizl 6 (€1,799 / $1,999), Priority Apollo Drop Bar Aluminium ($1,999), State Bicycle Co. 4130 All-Road SRAM Rival XPLR AXS ($2,000).
Is the Polygon Tambora A4 right for you?
Seven questions and the Oracle tells you which type of bike fits how you ride — and your size.
Consult the Oracle →