Stack and reach
How high and how far forward the top of the head tube is, from the bottom bracket. They are the two numbers that decide whether a frame can be set up like yours.
BB, or bottom bracket
The axle your cranks turn on, in the middle of the frame. Every number on this site is measured from it, because it is the one point that sits in the same place on every bike.
Headset cover
The little cap on top of the head tube, under your spacers. Most makers do not publish it, so I assume 10 mm and add 6 mm to the band beside every answer.
Stem clamp, and its centre
The collar on the steerer that your stem bolts to. I need the middle of it. Where a maker gives only the height, I assume halfway up and say so on the answer.
Steerer
The tube coming up out of the fork. The cover, the spacers and the stem all sit on it, and it is the thing a mechanic cuts to length.
Bar reach
How far forward the hoods sit from the middle of the bar. Two bars on the same stem can put your hands 20 mm apart, which is why I ask.
Setback
How far your saddle sits behind the bottom bracket.
Drop
How much lower your hands sit than your saddle. On a riser bar I count the bar's rise, so the drop is that much less than it is to the clamp.
Rails, and the rail centre
The two rods under your saddle, and the middle of the straight part of them. That midpoint is the point I use, because it is the one you can find with a tape.
The band
How far out I could be, in millimetres, and why. It is a straight sum of everything I had to assume rather than a clever average, so it errs wide on purpose.
wb, stand, trail
Wheelbase, standover and trail: how long the bike is, how high the top tube is where you straddle it, and how steady the steering feels. I show them against your bike, and I leave them out when the maker does not publish them.
est.
Estimated: a number I worked out rather than read off the maker's table. Anything marked this way can move if the maker publishes the real one.
Close Escape closes it. The measuring guide has the pictures. Open the measuring guide
Giant Revolt X Advanced Pro
Gravel · 5 sizes
The Revolt X Advanced Pro on giant-bicycles.com
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This is the bike I ride
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- Bike
- Giant Revolt X Advanced Pro · Gravel · 5 sizes
- Geometry
- giant-bicycles.com, fetched 20 Oct 2026, re-checked, no differences
- Seat angle convention
- Calculated from Giant's table
- Cockpit
- Generic stem and bar, assumed
- Solved with
- cover 10 mm (assumed), max spacers 40 mm (assumed), stem clamp centre 20 mm (assumed), so every verdict carries ±10 mm at the bar
- Sheet
- 22 October 2026 · 879 bikes, 79 makes, 4,979 sizes in the catalogue
Geometry, every size, from the maker's table
The tinted row is the size drawn beside it. Press a size to draw it.The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The ML drawn to scale from the table, with no build on it. Stack and reach run from the bottom bracket to the top of the head tube; every size is solved from those two. One square is 100 mm.
The maker's cockpit
No stock cockpit I can name, so every size is solved on a generic stem and bar unless you choose one on the sheet.Generic stem and barAssumedNo bar is listed for this frame.
Stock stem and bar per sizeS 60 x 440, M 70 x 460, ML 80 x 460, L 80 x 480, XL 90 x 480 (stem length x bar width, mm)
Frame facts
read from the maker's words, not a table: giant-bicycles.com- Tyre clearance
- not recorded yet
- Bottom bracket
- not recorded yet
- Axles and brakes
- 12x100 front
- UDH
- not recorded yet
- Seatpost
- 30.9 mm round
- Frame weight
- not recorded yet
In the maker's words
Kept whole, as I read it off giant-bicycles.com.Revolt X Advanced Pro 2 (2024), Giant UK spec: Handlebar "Giant Contact SL XR D-Fuse, 31.8mm S:44cm, M:46cm, M/L:46cm, L:48cm, XL:48cm"; Stem "Giant Contact, 8-degree S:50mm, M:60mm, M/L:70mm, L:70mm, XL:80mm" (stem angle 8 degrees as printed; note the geometry table's Stem Length row prints 60/70/80/80/90 mm for S-XL, 10 mm longer than the spec line, and its Handlebar Width row 440/460/460/480/480 mm).
Cockpit and seatpost, in the maker's words · 93 words
Revolt X Advanced Pro 2 (2024), Giant UK spec: Handlebar "Giant Contact SL XR D-Fuse, 31.8mm S:44cm, M:46cm, M/L:46cm, L:48cm, XL:48cm"; Stem "Giant Contact, 8-degree S:50mm, M:60mm, M/L:70mm, L:70mm, XL:80mm" (stem angle 8 degrees as printed; note the geometry table's Stem Length row prints 60/70/80/80/90 mm for S-XL, 10 mm longer than the spec line, and its Handlebar Width row 440/460/460/480/480 mm). Fork "RockShox Rudy XPLR, 40mm, cartridge damper12x100mm thru-axle" (a 40 mm travel suspension fork). Seatpost "Post Moderne, dropper, 30.9mm with 30mm of suspension ... 415mm / 100mm drop" on every size.
OFFICIAL SOURCE: Giant UK page for the Revolt X Advanced Pro 2 (2024), page title "Revolt X Advanced Pro 2 (2024) | Gravel bike | Giant Bicycles UK" (the series page /gb/bikes-revolt-x-advanced-pro-2024 lists the Pro 0 and Pro 2). Source: html table (official Giant UK bike page, section "Sizing Guide and Geometry", the HTML <table class="geometry"> with mm and inch spans; fetched 2026-10-20
How I read the maker's table
Five sizes S, M, M/L (Giant's table header prints ML), L, XL; the spec Sizes line agrees. The frame has a two-position flip chip dropout ("adjusts the wheelbase short for quicker handling, or long for improved stability at speed. The long setting also allows for larger diameter tyres up to 53mm"; "53mm max tyre size in "long" flip chip position, 45mm max tyre size in "short" flip chip position"). FLIP CHIP: in rows B, E, G, H, I, J and M Giant prints two values per cell separated by a divider, the second marked in the page markup as the "highversion" (the page gives the two no text label). The first values are the short setting (425 mm chainstay) and are the ones stored here; the second, long setting values are: seat angle S 73.4, M 73.4, ML 72.9, L 72.9, XL 72.9; head angle S 70.9, M 71.4, ML 71.9, L 71.9, XL 71.9; trail S 80.3, M 76.8, ML 73.4, L 73.4, XL 73.4; wheelbase S 1034, M 1036, ML 1041, L 1051, XL 1067; chainstay 435 all sizes; BB drop 69 all sizes; standover S 743, M 761, ML 778, L 796, XL 814. Stack, reach, top tube, head tube and seat tube are single values. Bike Insights files the same two settings as the MY2023 Revolt X Advanced Pro "Short Flip Chip" and "Long Flip Chip". The fork is a 40 mm RockShox Rudy XPLR; Giant does not say whether the table is drawn at sag. Giant's row keys: A Seat Tube Length, B Seat Tube Angle, C Top Tube Length (recorded as top_tube_effective), D Head Tube Length, E Head Tube Angle, F Fork Rake (fork_offset), G Trail (printed, kept), H Wheelbase, I Chain Stay Length, J Bottom Bracket Drop, K Stack, L Reach, M Stand Over Height, N Handlebar Width, O Stem Length, P Crank Length 170/172.5/172.5/175/175, Q Wheel Size printed "700x 42C" on every size although the stock tyre is 700x45c. Giant does not say whether the seat angle is effective or actual (null), does not publish front centre (null) and does not state the stack datum (null). PROBABLE MAKER TYPO, FLAGGED NOT CHANGED: row F prints Fork Rake 50 mm on every size, but Giant's own printed short-setting trail (76.9/73.5/70.1) is what a 45 mm offset gives on these head angles with a 45 mm tyre (about 75 to 77 mm on S), while 50 mm gives about 7 mm less (69.7/66.4/63.1); Bike Insights records 45 (not checked against RockShox). The 50 is stored as printed.
Source: html table (official Giant UK bike page, section "Sizing Guide and Geometry", the HTML <table class="geometry"> with mm and inch spans; fetched 2026-10-20, HTTP 200)