184 cm sits right on the M/L line
At 184 cm with an 84 cm inseam, either Aeroad size fits by the numbers. Canyon's own chart puts you at the top of M and the bottom of L, so the call comes down to reach preference and arm length, not height alone.
2026 frame sizes by height and inseam for Aeroad, Ultimate, Endurace, Grail, Spectral and Neuron

Canyon sells direct and sizes you with its Perfect Positioning System, which pairs your height with inseam rather than leg length alone. Road and gravel bikes like the Aeroad, Ultimate, Endurace and Grail run 2XS to 2XL, while Spectral, Neuron and other mountain bikes use XS to XL. Find your height row first, check it against your inseam, then look at reach if you land between two sizes. Since you can't test ride before buying, it pays to confirm with a calculator.
| Size | Height Range | Inseam Range |
|---|---|---|
2XS | 5'1" - 5'4"(155 - 163 cm) | 27.6" - 29.1"(70 - 74 cm) |
XS | 5'3" - 5'7"(161 - 169 cm) | 28.7" - 30.3"(73 - 77 cm) |
S | 5'6" - 5'9"(167 - 175 cm) | 29.9" - 31.5"(76 - 80 cm) |
M | 5'8" - 5'11"(173 - 181 cm) | 31.1" - 33.1"(79 - 84 cm) |
L | 5'10" - 6'2"(179 - 187 cm) | 32.7" - 34.6"(83 - 88 cm) |
XL | 6'1" - 6'4"(185 - 193 cm) | 34.3" - 36.2"(87 - 92 cm) |
2XL | 6'3" - 6'7"(191 - 200 cm) | 35.8" - 38.2"(91 - 97 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
XS | 5'0" - 5'4"(153 - 163 cm) | 26.8" - 29.1"(68 - 74 cm) |
S | 5'3" - 5'8"(161 - 172 cm) | 28.3" - 30.7"(72 - 78 cm) |
M | 5'7" - 5'11"(170 - 180 cm) | 30.3" - 32.7"(77 - 83 cm) |
L | 5'10" - 6'2"(178 - 188 cm) | 32.3" - 34.6"(82 - 88 cm) |
XL | 6'1" - 6'6"(186 - 198 cm) | 34.3" - 37.0"(87 - 94 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
XS | 5'1" - 5'5"(155 - 165 cm) | 27.6" - 29.5"(70 - 75 cm) |
S | 5'4" - 5'8"(163 - 173 cm) | 29.1" - 31.1"(74 - 79 cm) |
M | 5'7" - 5'11"(171 - 181 cm) | 30.7" - 33.1"(78 - 84 cm) |
L | 5'10" - 6'2"(179 - 189 cm) | 32.7" - 35.0"(83 - 89 cm) |
XL | 6'2" - 6'6"(187 - 198 cm) | 34.6" - 37.0"(88 - 94 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
2XS | 5'1" - 5'4"(155 - 163 cm) | 27.6" - 29.1"(70 - 74 cm) |
XS | 5'3" - 5'7"(161 - 169 cm) | 28.7" - 30.3"(73 - 77 cm) |
S | 5'6" - 5'9"(167 - 175 cm) | 29.9" - 31.5"(76 - 80 cm) |
M | 5'8" - 5'11"(173 - 181 cm) | 31.1" - 33.1"(79 - 84 cm) |
L | 5'10" - 6'2"(179 - 187 cm) | 32.7" - 34.6"(83 - 88 cm) |
XL | 6'1" - 6'5"(185 - 195 cm) | 34.3" - 36.6"(87 - 93 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
XS | 5'1" - 5'5"(155 - 166 cm) | 27.6" - 29.9"(70 - 76 cm) |
S | 5'5" - 5'9"(164 - 174 cm) | 29.5" - 31.5"(75 - 80 cm) |
M | 5'8" - 5'12"(172 - 182 cm) | 31.1" - 33.1"(79 - 84 cm) |
L | 5'11" - 6'3"(180 - 190 cm) | 32.7" - 35.0"(83 - 89 cm) |
XL | 6'2" - 6'7"(188 - 200 cm) | 34.6" - 37.4"(88 - 95 cm) |
This road chart provides a starting range, not final fit. Smaller does not always mean racier, and larger does not guarantee comfort. Verify exact model-year geometry.
Enter height from 120 to 220 cm and cycling inseam from 50 to 120 cm, shorter than your height.
Respect seatpost minimum insertion, saddle rail marks, and fork and stem spacer limits. Set the saddle for pedaling, not to repair handlebar reach. A stem change cannot fix unsafe standover or unavailable bar height. Stop if pain, numbness, brake access or handling remains a problem and consult a fitter; persistent symptoms also need medical advice.
Sizing reference
The shared road-bike table above is a general reference used across this page. Canyon's own Aeroad chart runs its M and L height ranges about 5 cm higher, and the Ultimate CF SL/SLX shares those exact same Aeroad numbers at every letter size rather than the shared table's. Use the numbers below when sizing an Aeroad or Ultimate specifically.
Aeroad M
178-184 cm height, 560 mm stack, 393 mm reach
Aeroad L
184-190 cm height, 580 mm stack, 401 mm reach
184 cm exactly
That is the published line between M and L - the top of M and the bottom of L
At 184 cm with an 84 cm inseam, either Aeroad size fits by the numbers. Canyon's own chart puts you at the top of M and the bottom of L, so the call comes down to reach preference and arm length, not height alone.
Canyon's shared road table lists M at 173-181 cm. That generic range does not match what Canyon actually publishes for the Aeroad or the Ultimate - both models' own charts put M at 178-184 cm. Go by the Aeroad-specific ranges here instead; they apply to the Ultimate at the same letter size too.
Best for: riders who want a low, aero position and are comfortable with a fully integrated cockpit
M fits 178-184 cm (560 mm stack, 393 mm reach). L fits 184-190 cm (580 mm stack, 401 mm reach). The integrated bar and stem are hard to change after purchase, so it is worth confirming with Canyon's Perfect Positioning System before you order.
Fit tip: Right at 184 cm? Go by reach preference and arm length, not height alone.
184 cm is the exact boundary in Canyon's own Aeroad chart. Riders with longer arms or a preference for a stretched-out aero position tend to prefer L; riders who want a slightly more compact front end tend to prefer M.
Specific sizing recommendations for Canyon's most popular bike models. Geometry measurements shown for reference size (typically M or 54cm).
Aero race bike with a fully integrated cockpit, so size selection matters more here than on a relaxed frame - there is little room to correct it with a stem swap afterward. Size M is 560 mm stack / 393 mm reach on Canyon's own Aeroad-specific chart, which runs about 5 cm higher in height range than the shared road-bike table on this page: M covers 178-184 cm here, not 173-181 cm. Use Canyon's PPS tool for a precise fit; see the Aeroad size-range note above the chart if you are deciding between M and L.
Endurance road bike with a taller stack and shorter reach than the Aeroad, plus Canyon's VCLS vibration-damping seatpost. The relaxed geometry accommodates a wider range of flexibility-riders between sizes should size up for all-day comfort or size down if they prefer a sportier, more compact cockpit.

Trail/enduro bike with 150mm travel. Modern long geometry-many riders size down from road sizing; prioritize reach over height.
Gravel bike with unique double-decker handlebar. CP20 cockpit affects fit-consider stack height when sizing.
Full-suspension e-MTB with Bosch Performance CX motor and 750Wh battery. 140mm travel trail geometry pairs with Canyon's Triple Phase suspension-use Canyon's PPS fit tool and size as you would for the acoustic Neuron.
E-gravel bike with Bosch SX motor and 400Wh battery, plus optional range extender. Unique double-decker handlebar and gravel-optimized geometry-riders should match their Grail CF size for consistent positioning on long mixed-terrain rides.
Urban commuter e-bike with Bosch Performance Line motor and 545Wh integrated battery. The motor adds roughly 3.5 kg of low-centered weight which stabilizes handling at speed. Available in diamond and step-through frames-step-through riders should match standover height to inseam, while diamond-frame riders should also consider reach to the flat handlebar for a relaxed commuting posture.
5th-gen all-rounder race frame: lighter and slightly more compliant than the Aeroad, with semi-aero tube shapes that compromise less on climbing. Size M is 560 mm stack / 393 mm reach - identical to the Aeroad CFR at the same size, so the two frames put a rider in the same riding position. The real difference is in tube shaping and a shorter seat tube (510 mm versus the Aeroad's 533 mm) for more seatpost extension, not a taller or lower front end. Available across CF SL, CF SLX and CFR layups; geometry is identical between them.
Pure UCI cyclocross race frame: 33c tire clearance, high bottom bracket for pedal clearance through corners, and the distinctive kinked top tube for shouldering during run-ups. Size M is 572/393 - 12 mm taller and identical reach to the road-going Ultimate CF SL (and the Aeroad CFR, which shares the Ultimate's M-size numbers). CX-specific; not the right frame for gravel bikepacking despite the drop bars (look at the Grail or Grizl instead).
Enduro full-suspension with 160 mm rear travel, 170 mm fork, and the Shapeshifter geometry-adjust system that drops the seat angle by 1.5° and lowers the BB at the flick of a lever. Size M reach is a long 475 mm with 634 mm stack - aggressive even by modern enduro standards. Many riders in the 172-180 cm range will be more comfortable sizing down to S (455 mm reach) for technical, switchback-heavy terrain.
Down-country / aggressive XC platform with 120 mm front and 110 mm rear travel - splits the difference between the pure-XC Lux World Cup and the trail-leaning Neuron. Size M stack/reach is 600/460. Compared to the Cannondale Scalpel (M 602/430) the Lux Trail runs 30 mm longer in reach, which suits taller riders or anyone wanting more stability on rough descents.
Race-spec downhill bike with 200 mm rear travel, high-pivot idler, and a 63° head angle. Available in full 29" or Mullet (29"/27.5") spec - both share the M reach of 460 mm and stack of 623 mm. Park and race bike only; the steep seat tube angle and DH-only suspension make it unsuitable for trail riding. Most park riders pick the size based on bike park preference - shorter reach (M) for playful, longer (L) for raw race speed.
Fitness flat-bar based on Endurace road geometry but with a wider 28c tire spec and integrated lights/fenders/rack mounts. Size M is 563/420 - the reach matches an Endurace M (375 mm + 45 mm of stem and bar reach for a comparable cockpit). Best for commuters and fitness riders who want road-bike efficiency without drop bars.
Trekking hybrid built around 700×50c tires, a suspension fork, and a wide-range 1x drivetrain. Size M stack/reach is 617/404 - more upright than the Roadlite but tipped slightly forward for efficient pedalling over distance. The standard diamond frame and the mid-step variant share most of the geometry; mid-step lowers the standover by about 40 mm for easier mount-and-dismount.
Aggressive alloy hardtail with 140 mm fork and trail-bike geometry - longer reach and slacker head angle than a typical XC hardtail. Size M is 626/455, which is identical reach to the Lux Trail full-suspension at the same number. Riders shopping the Stoic against the Cannondale Trail SE 4 (M 626/440) get 15 mm more reach for similar money - more capable on steep descents but a stretched-out cockpit on long climbs.
Light-assist e-road bike with Fazua Ride 60 motor in the bottom bracket and a 430 Wh battery in the down tube - the integration is subtle enough that the bike looks like a regular Endurace AL. Published M geometry (590/378) is close enough to the acoustic Endurace AL that riders sizing from one to the other can stick with the same frame size. Battery removal is tool-less, useful for riders who park outdoors.
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Helmets, saddles, lights and locks that fit any Canyon build.

Bell
This ASIN is Small/Medium 52-57 cm. Check the selected Amazon size/color before checkout.

Avasta
Standard saddle rail spacing fits most kids' seatpost clamps. Designed primarily for 12-20" wheel kids' bikes; larger riders may prefer a wider adult saddle.

Bell
Tool-free handlebar mount; check bar space around computers, bells, and baskets.

Abus
Inner dimensions: 5.5" x 8" (14 x 20cm). Premium size for frame + wheel security. Heavy-duty for high-theft areas.

Bivo
Fits most major cages, but the 77 mm maximum diameter is a touch larger than a standard plastic bottle. Check tight side-load cages on very small frames.

Giro
S 51-55 cm, M 55-59 cm, L 59-63 cm
See why Canyon is a great fit for E-Bike Riders
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Competitive Cyclists Sizing GuideSee why Canyon is a great fit for Competitive Cyclists
Tall Riders Sizing GuideSee why Canyon is a great fit for Tall Riders
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