Specialized Crux Size Chart
Crux runs 49 to 61 cm in six sizes. Specialized's height chart is not evenly spaced. Size 49 covers three centimetres of height and size 56 covers eight, so read the range for the size you land on instead of assuming a step.
- Frame sizes
- 49–61 cm · 6 sizes
- Rider height
- 5'1"–6'6"
- Height (cm)
- 155–198 cm
- Stack / reach · 56
- 578 / 400 mm
Crux size finder
Which Crux size covers your height?
Height gives you one size, or two when the published height ranges overlap. Stack, reach, and standover settle the overlap.
Enter your height and the Crux size that covers it is marked in the tables below.
How to measureHeight gives the starting size. Standover and reach confirm it.
Height ranges
Where each size starts and ends
Height ranges for every Crux size, 151 to 202 cm overall. 49: 155 to 158 cm. 52: 163 to 168 cm. 54: 168 to 175 cm. 56: 175 to 183 cm. 58: 183 to 191 cm. 61: 191 to 198 cm.
- 49155–158 cm
- 52163–168 cm
- 54168–175 cm
- 56175–183 cm
- 58183–191 cm
- 61191–198 cm
Size chart
Crux size by height
Rider height is the size chart Specialized publishes for this frame. It publishes no rider inseam for the Crux, so the table shows height only.
49
5'1"–5'4"
155–158 cm
Smallest Crux frame, with the lowest standover in the table at 753 mm.
52
5'4"–5'6"
163–168 cm
The step to 54 adds 6 mm of reach, the smallest reach step in the ladder.
54
5'6"–5'9"
168–175 cm
Reach grows 6 mm over 52 and another 12 mm to 56.
56
5'9"–6'0"
175–183 cm
Widest height range in the ladder at eight centimetres. Stack and reach above are for this size.
58
6'0"–6'3"
183–191 cm
Stack adds 20 mm over 56 and 23 mm to 61, the largest stack step in the ladder.
61
6'3"–6'6"
191–198 cm
Tallest Crux frame. Standover climbs 26 mm over 58, the largest standover step.
Start with height. If two sizes overlap, use cycling inseam to choose.How to measure
Geometry
Crux geometry by size
Stack, reach, and standover for every Crux size, read from Specialized's geometry table.
49
5'1"–5'4"
- Stack
- 530 mm
- Reach
- 375 mm
- Standover
- 753 mm
52
5'4"–5'6"
- Stack
- 547 mm
- Reach
- 382 mm
- Standover
- 766 mm
54
5'6"–5'9"
- Stack
- 560 mm
- Reach
- 388 mm
- Standover
- 781 mm
56
5'9"–6'0"
- Stack
- 578 mm
- Reach
- 400 mm
- Standover
- 803 mm
58
6'0"–6'3"
- Stack
- 598 mm
- Reach
- 412 mm
- Standover
- 823 mm
61
6'3"–6'6"
- Stack
- 621 mm
- Reach
- 425 mm
- Standover
- 849 mm
495'1"–5'4"
Stack530 mmReach375 mm525'4"–5'6"
Stack547 mmReach382 mm545'6"–5'9"
Stack560 mmReach388 mm565'9"–6'0"
Stack578 mmReach400 mm586'0"–6'3"
Stack598 mmReach412 mm616'3"–6'6"
Stack621 mmReach425 mm
How neighboring sizes compare
If you're 178 cm and fall inside both the 54 and 56 ranges, compare reach and standover rather than assuming the larger size is more comfortable.
How to measure a bike frame- Size stepStackReachStandover
- 49 → 52+17 mm+7 mm+13 mm
- 52 → 54+13 mm+6 mm+15 mm
- 54 → 56+18 mm+12 mm+22 mm
- 56 → 58+20 mm+12 mm+20 mm
- 58 → 61+23 mm+13 mm+26 mm
Bike size calculator
Find your Specialized Crux size
Enter your height and inseam for a Specialized gravel bike, then compare the result with this Crux chart.
Sizing notes
Why height alone is not enough
Riders with the same height can need different sizes because inseam, torso length, flexibility, and preferred handling differ.
3 checks
Stack climbs 91 mm from 49 to 61 while reach grows 50 mm, so the front end rises almost twice as fast as the frame lengthens.
Standover climbs 96 mm across the ladder. The largest step is 58 to 61 at 26 mm.
Reach moves 50 mm across six sizes. Sizes 54 and 56 both cover a 175 cm rider, so let reach decide between them.
Sources
Confirm the exact bike after you have a starting size
Every number on this page comes from the sources below. Check the exact model year there before you buy.
Data reviewed:
Compare
Compare before buying
A size label does not mean the same thing across brands. Compare published geometry before you choose.
Related guides
More Specialized and gravel sizing
Once you have a starting size, compare this frame against the Specialized chart and the gravel guide.
Specialized bike size chart
Compare Crux against broader Specialized size guidance.
Gravel bike size chart
Check gravel sizing by height and inseam before choosing a frame.
Questions
Crux size chart FAQ
Short answers for Specialized Crux sizing.
What size Specialized Crux should I ride?
Start with Specialized's height range: 49 for 155–158 cm, 52 for 163–168 cm, 54 for 168–175 cm, 56 for 175–183 cm, 58 for 183–191 cm, and 61 for 191–198 cm. The gaps between those ranges are uneven, so confirm the range for the size you pick.
What size Crux fits a 175 cm rider?
175 cm sits at the top of Specialized's 54 range, which stops at 175 cm, and at the bottom of 56, which starts there. The 54 carries 560 mm of stack and 388 mm of reach; the 56 carries 578 mm and 400 mm.
Does the Specialized Crux come in a 44?
No. Crux runs from 49 to 61 cm, so 49 is the smallest frame and it takes riders from 155 cm. Tarmac publishes a 44, so a smaller road frame exists, but not in the Crux.
How tall is a Specialized Crux 56 for?
Specialized publishes Crux 56 for 175–183 cm, which is 5'9"–6'0". It carries 578 mm of stack, 400 mm of reach, and 803 mm of standover.
Is a 54 Crux the same size as a 54 Diverge?
No. Crux 54 covers 168–175 cm and Diverge 54 covers a different band, because Specialized publishes a separate height chart for each family. Check the number on the model you are buying.