Isaac Torus XR (2027)

gravel · carbon · sizes XS–XXL · tyres up to 55 mm Manufacturer’s website

Good to know: Configurable build

Configurable build (at least partly: the cockpit or bar width, for example). The stock build below is only one of the options.

Geometry ?

Isaac Torus XR 2027 geometry in sizes XS–XXL: stack 540–650 mm, reach 385–417 mm, head angle 69.5–71°.

	XS	S	M	L	XL	XXL
Stack	540 mm	563 mm	585 mm	607 mm	630 mm	650 mm
Reach	385 mm	392 mm	400 mm	406 mm	412 mm	417 mm
Head angle	69.5°	70°	71°	71°	71°	71°
Seat angle	74°	74°	74°	74°	74°	74°
Seat tube (c-t)	408 mm	438 mm	468 mm	503 mm	538 mm	571 mm
Head tube	87.5 mm	109.9 mm	128.9 mm	152.2 mm	176.5 mm	197.7 mm
Top tube (effective)	539.8 mm	553.4 mm	567.7 mm	580.1 mm	592.6 mm	603.4 mm
BB drop	80.2 mm	80.2 mm	80.2 mm	80.2 mm	80.2 mm	80.2 mm
Chainstay	435 mm	435 mm	435 mm	435 mm	435 mm	435 mm
Wheelbase	1040.2 mm	1050.6 mm	1056.3 mm	1069.9 mm	1083.8 mm	1095.7 mm
Standover	736.8 mm	763.9 mm	791 mm	820.5 mm	850 mm	878.4 mm
Fork length	421.8 mm	421.8 mm	421.8 mm	421.8 mm	421.8 mm	421.8 mm
Fork offset	52 mm	52 mm	52 mm	52 mm	52 mm	52 mm
Stock build by size
Cranks	165 mm	170 mm	170 mm	172.5 mm	172.5 mm	172.5 mm
Stem	80 mm	90 mm	100 mm	110 mm	110 mm	120 mm
Stem angle	−8°	−8°	−8°	−8°	−8°	−8°
Bar width	380 mm	380 mm	400 mm	400 mm	420 mm	420 mm

Source: isaac-cycle.com, checked 1 Nov 2026 · bar position: worked out from published data

Stock build

Torus XR SRAM Rival XPLR AXS E1 1x13, DT Swiss G1800 €3,799

Options when ordering (manufacturer’s default in bold):

Size	Stem
all	80, 90, 100, 110, 120 mm

Source: isaac-cycle.com, checked 1 Nov 2026

Frames with similar geometry

Stack and reach within 12 mm of size L (stack 607 / reach 406 mm).

Spotted a mistake or a missing build? Let me know.