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  • Lightweight aluminum alloy frame and fork employ ultra-sleek aesthetics
  • Integrated cargo rack and fenders keep you dry and stylish
  • Shimano Alfine 8-speed internal gear rear hub and belt-driven Conti Drive system provide smooth, maintenance-free shifting
  • Shimano 355 hydraulic disc brakes and rotors provide worry-free stopping power
  • Integrated kickstand
  • REI is proud to be the exclusive U.S. retailer of GHOST brand bikes
  • Pedals sold separately
  • Specs are subject to change


All bicycles sold at REI include a free warranty tune-up. New bikes go through a normal break-in period, after which readjustment is important for longevity and performance. Bring your new bike in to your local REI for its free tune-up within 20 hours of use or 6 months from purchase, whichever comes first. Contact your nearest REI bike shop to schedule this important service.


When you purchase your GHOST-brand bike on, have it shipped to any REI store where it will be ready for pick up fully assembled (and you'll avoid the home-delivery oversize shipping charge)!

View all GHOST Hybrid Bikes

REI membership


Best Use Urban Cycling
Frame Square Urban aluminum alloy
Bike Suspension No Suspension
Fork Alloy rigid
Crankset Miranda beta
Bottom Bracket Unavailable
Shifters Shimano Alfine SL
Rear Derailleur Conti Drive System
Rear Cogs Conti Drive 20 Z
Number of Gears 8
Internally Geared Yes
Brake Type Hydraulic Disc Brake
Brakes Shimano 355 hydraulic disc, 160mm rotor
Brake Levers Shimano 355 hydraulic disc
Rims ALEX TD19 700C
Front Hub Shimano HB-RM 33 quick-release
Rear Hub Shimano Alfine internal gear hub 8-speed
Wheel Size 700c
Tires Schwalbe Kojak 700 x 35
Tire Width 35 millimeters
Handlebar Shape Riser Bar
Handlebar Square Urban aluminum alloy
Stem GHOST AS GH2 31.8mm
Seat Post GHOST light DC1 31.6mm
Saddle GHOST 2059 DRN
Pedals Sold separately
Chain Conti Drive belt
Belt Drive Yes
Weight 30 pounds
Bike Weight Bike weight is based on median size, as sold, or the average of two median sizes.
Gender Unisex

Size chart

Sizing notes

All measurements are stated in millimeters or degrees unless otherwise indicated.

Graphic of a bike and its measurements

How we measure bikes

Understanding bike geometry helps you get a perfect fit.

1. Reach

2. Stack

3. Effective Top Tube

4. Seat Tube Center to Top

5. Standover Height

6. Head Tube Length

7. Head Tube Angle

8. Seat Tube Angle

9. Bottom Bracket Height

10. Wheelbase

11. Chainstay Length

12. Fork Offset

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I don't see a size chart for the Ghost Square Urban 6. Would a Medium be the right size for a 5' 7" rider with a 30-inch inseam?

Asked by: Arlington Biker
We are working to provide an updated bike size chart. Below you can see the standover heights for small and medium. S standover is 29" M standover is 30.3" If your pant inseam is 30 inches then your full inseam is probably about 31 or 32" which would mean the size medium is most appropriate.
Answered by: REIservice
Date published: 2017-03-17

Do you know what the model number of the Alfine Hub is?.....SG-S7000-8 hub?

Asked by: Guybert541
We're sorry, but that information is not available.
Answered by: REIservice
Date published: 2017-04-30

I love this bike but what's up with no chain (belt) guard. It is a commuter bike! They went through the trouble of fitting it with fenders. Can it be fitted with a guard?

Asked by: lkshrtrl
It might be possible to fit this bike with a chain guard and you will want to consult a bike shop for details. Here is an REI store contact list where you can contact an REI bike shop;
Answered by: REIservice
Date published: 2017-05-25

Am I viewing the photo correctly - the top of the rack is *lower* than the top of the rear wheel? How are you supposed to mount anything to the top? Or is the idea that panniers would just drape over the fender?

Asked by: SagaciousB
The integrated cargo rack is lower than the top of the wheel.
Answered by: REIservice
Date published: 2017-06-12

Can the pannier racks and wheel guards be removed (to make the bike a tad lighter)? Thanks 

Asked by: elasha
Yes, the rack on fenders can be easily removed.
Answered by: REIservice
Date published: 2017-04-27

You just ran out of Large size. When are you getting more in?

Asked by: ckliemt
​More are expected for spring 2017.
Answered by: REIservice
Date published: 2017-01-11

Can I fit the Ortlieb Back-Roller Classic Panniers on the integrated cargo rack of this bike?

Asked by: Fabien
The Ortlieb Back-Roller Classic Panniers do fit on the integrated cargo rack on this bike.
Answered by: REIservice
Date published: 2017-04-19

Can this be fitted with a 'Grip-shift' type shifter?

Asked by: Melz
​The Alfine disc hub on this bike comes with Alfine SL shifters that are designed to work well with this drive system. We do not recommend using grip-shifts.
Answered by: REIservice
Date published: 2017-03-29
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