HazardsGravel on the apex
กรวดกลางโค้ง
The road is swept by rain, and rain puts everything it moves on the inside of the bend.
What it is
Sand, grit and washed gravel collect on the inside line of a hairpin and at the exit of a cutting. It is the most common surface hazard on this circuit and the least visible.
The long version
Inference — the physical reason is simple: water running off a banked hillside crosses the road at the low point, which on a hairpin is the inside, and drops whatever it is carrying when it slows. So the loose material is not randomly distributed — it is where you were planning to put the front wheel.
The two places to expect it are the apex of an uphill hairpin and the first fifty metres after a cutting or a culvert. It is worst in the days after rain and after the rains end, when weeks of wash are still sitting there.
What to do about it is a line choice, not a skill: stay wide, turn late, get the bike upright before the throttle, and treat the inside third of a blind hairpin as though it is not there.
Runs with
- termHairpin — The shape that collects it.
- bikeThe 250–450 trail bike — The front wheel that minds it least.
- eventThe rains — The season that puts it there.
Named here by
- hazardRiding after dark — Invisible at night.
- bikeThe 250–450 trail bike — What the front wheel size is buying.
- kitWhat to wear — The fall this is for.
- termHairpin — What collects on the inside of one.
Where each claim comes from
| Field | Tier | Source | Note |
|---|---|---|---|
| default | inference | ||
| text_th | inference | written in Thai by this project, not machine-translated |
Sources
- Motorcycle safety — Wikipedia (en)
- Hairpin turn — Wikipedia (en)
cited Cited — a named source, linked · harvested Harvested — fetched from an open dataset, with its licence · tradition Tradition — general knowledge of the tradition, hedged · inference Inference — this project's own reasoning from the above · field Field — someone stood there