Pick the frame size that your PBH falls most in the middle of the range. For instance: I (Will) have a 96cm PBH, so I could ride the 59cm, but a 64cm will fit better because I won't be maxing out the size.

Since there's no standover issues, you can go bigger if you want:

A lot of our customers and some staff have found that oversizing the Clems makes for a more luxurious ride. If you want to try that, use the following formula to figure out if you can achieve your saddle height on a bigger frame:

MINIMUM SADDLE HEIGHT per FRAME SIZE = Seattube length + 13cm. 

Measured from center of crank to top of saddle. It's simple, it works like this: Measure your PBH (pubic bone height) and subtract 11cm. That's a good saddle height for you. Subtract 13cm, and that's your maximum Clem frame size. It assumes a saddle without springs, a fairly normal saddle. Example: If your PBH is 85cm, your saddle height is probably 74cm, and 74-minus-13 is 61, so you could easily ride a 61. But since we dont make that size. You can ride a 59cm. OR even, easily, a 52cm. In general it feels great to ride the biggest frame you can fit, but CLEMs have plenty of handlebar-height adjustability, so a 52cm will feel great, too. 

Is there room for customization?

Only if you're picking the bike up here, and there will be a labor charge. Part of the reason we can keep the cost down on completes is that we send them out straight as they come to us. We also can't add additional parts to the boxes; if you need additional parts, please make a separate order. 

Relevant specs: 

Seatpost Dimensions — 26.8mm for 45cm and 52cm and 29.8mm for 59cm and 64cm

Rear spacing - 135mm and QR wheels only. 

Front derailer clamp size - 31.8mm for all sizes. Get a $32 Skeleton Key FD on our site. It's not a looker, but it works so, so well. 

Complete Bikes

• FSA Duron Headset
• Shimano 118mm Cartridge BB
• Rivendell Silver 38/24t Crank w/ chainguard for 45cm and 52cm and Silver 34/24 for 59cm and 64cm
• Tektro 837AL V-Brakes
  
• Tektro RS360 Levers
  
• Alex DM24 Rim / Novatech Hubs
  
• Kenda K-1129 Kwick Journey 45mm Tires (sturdy, puncture-resistant, reflective stripe)
• A Sunrace thumbie for the front derailer and a Sunrace trigger for the rear
• Sunrace rear derailer
• Skeleton Key front derailer
• 11-34 cassette
• Nitto Tallux Stem - 80mm for the smaller sizes, 110mm for the bigger two.
  
• Our world-famous Tosco handlebars, 55cm for the 45 and 52cm frames, 60cm for the two bigger sizes
  
• Kalloy Seatpost — 26.8mm for 45cm and 52cm and 29.8mm for 59cm and 64cm
• Braze ons on the rear chainstay for a dutch style 'cafe lock'. Our recommendation is the Abus Amparo 4750SL Frame/Wheel Lock 104mm Mount Spacing 82mm Clearance
  

Choose your own pedals, and handlebar grips.  (not included) 

Frame and Wheel Sizes

• 45cm / 27.5-inch Typical rider height: 5-0 to 5-5
• 52cm / 27.5-inch Typical rider height: 5-5 to 5-11
• 59cm / 700c traditional road rim size, but with room for 29er tires
• 64cm / 700c traditional road rim size, but with room for 29er tires