Watch Almanac
Grand Seiko

Sport Hi-Beat 36000 GMT

Ref. SBGJ237

Case diameter
44.2 mm
Manufacturer spec
Lug-to-lug
50.6 mm
Manufacturer spec
Thickness
14.4 mm
Manufacturer spec
Lug width
21 mm
Manufacturer spec

Retail price $7,600 (US, Oct 2026)

Ideal fit
Wrist flat: 55.1 mmLug-to-lug: 50.6 mm

How the Sport Hi-Beat 36000 GMT wears

Its lugs add 6.4 mm to the 44.2 mm case, close to the 7 mm typical across the almanac, so its diameter is a fair guide to how it wears.

On our fit model it sits best on wrists from 7" to 8.5" (17.8–21.6 cm); below 7" the lugs start to reach the edge of the wrist.

At 14.4 mm thick it is thicker than 94% of the 31 other gmt watches we've measured, so expect it to sit tall on the wrist.

Its 21 mm lug width is one of the most common strap sizes; 34 other watches here share it, so aftermarket straps are easy to find.

Will the Sport Hi-Beat 36000 GMT fit your wrist?

With a 50.6 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.

WristFlat width (est.)Fit
6"47.2 mmLugs overhang
6.5"51.2 mmLugs overhang
7"55.1 mmIdeal fit
7.5"59.1 mmIdeal fit
8"63 mmIdeal fit

Specifications

Reference
SBGJ237
Collection
Sport
Status
In production
Case material
stainless steel
Crystal
dual-curved sapphire (inner AR coating)
Water resistance
200 m
Bezel
rotating 24-hour bezel
Dial
midnight blue
Strap / bracelet
stainless steel bracelet, folding clasp with push button release
Weight
188 g
Style
GMT, Sport

Movement

Caliber
Grand Seiko 9S86
Type
automatic
Power reserve
55 hours
Frequency
36,000 vph (5 Hz)
Jewels
37
Accuracy
+5/-3 s/day (static); +8/-1 s/day normal use

Takes 21 mm straps. See other 21 mm watches and straps.

More Sport references

Watches that wear the same size

Other watches within 1.5 mm of its lug-to-lug.

Same 21 mm lug width

All 21 mm watches

These take the same straps as the Sport Hi-Beat 36000 GMT.

Sources