Cannondale Synapse 105 Bike
Light, stiff, fast and built for endurance, the Cannondale Synapse 105 bike is so comfortable that you'll barely notice as your rides get longer.
Key Details
- SmartForm C2 Alloy construction and full carbon fork deliver exceptionally light weight and a high-performance feel
- Shimano 105 group and FSA Gossamer crank offer reliable shifting and power transfer
- TRP Spyre-C mechanical disc brakes provide reliable stopping power for varied conditions
- Pedals not included
- NOTE: Specs and images are subject to change based on component availability
Imported.
- 1 year of free adjustments (see more below)
- In-store bike assembly
- Pickup in store or curbside
- Bike experts available at 170+ bike shops
- 20% off shop services
- Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
| Best Use | Road Cycling |
|---|---|
| Frame | SmartForm C2 Alloy |
| Bike Suspension | No Suspension |
| Fork | BallisTec Full Carbon, integrated crown race, SAVE, 12 x 100 mm thru axle, internal routing |
| Crankset | FSA Gossamer Alloy, BB30, 50/34t |
| Bottom Bracket | Cannondale BB30 |
| Shifters | Shimano 105, 11-speed |
| Front Derailleur | Shimano 105, braze-on |
| Rear Derailleur | Shimano 105 GS |
| Rear Cogs | Shimano 105, 11-34t, 11-speed |
| Number of Gears | 22 gear(s) |
| Brake Type | Mechanical Disc Brake |
| Brakes | TRP Spyre-C cable-actuated disc, 160/160mm rotors |
| Brake Levers | TRP Spyre-C |
| Rims | Cannondale RD 2.0 Disc, double wall with eyelets, 28h |
| Front Hub | Formula CRX-512, 12 x 100 thru axle |
| Rear Hub | Formula CX-22, quick-release axle |
| Wheel Size | 700c |
| Tires | Vittoria Zaffiro, 700c x 30 mm |
| Tire Width | 30 millimeters |
| Handlebar Shape | Drop Bar |
| Handlebar | Cannondale 3, 6061 alloy, compact |
| Stem | Cannondale 3, 6061 alloy, 31.8, 7 deg. |
| Seat Post | Cannondale 3, 6061 alloy, 25.4 x 300 mm (48-51), 350 mm (54-56), 400 mm (58-61) |
| Saddle | Cannondale Stage Ergo |
| Pedals | Not included |
| Headset | 1-1/4 to 1-1/8 in. tapered |
| Chain | KMC X11, 11-speed |
| Weight | 21 lbs. 13.2 oz. |
| Bike Weight | Bike weight is based on median size, as sold, or the average of two median sizes. |
| Gender | Unisex |
| 48 CM | 51 CM | 54 CM | 56 CM | 58 CM | 61 CM | |
|---|---|---|---|---|---|---|
| Reach | 37.1 | 37.6 | 38.3 | 38.9 | 39.4 | 40.3 |
| Stack | 53 | 55 | 57 | 58.9 | 60.9 | 63.9 |
| Effective Top Tube | 51.7 | 53.1 | 54.7 | 56.3 | 58 | 60.4 |
| Seat Tube Center-Top | 42.2 | 44.3 | 48 | 52 | 55 | 59 |
| Standover Height | 70.1 | 72.2 | 75.5 | 78.7 | 81.6 | 85.1 |
| Head Tube Length | 12.3 | 14.3 | 15.9 | 17.8 | 20.2 | 23.2 |
| Head Tube Angle (degrees) | 70.8 | 71 | 71.9 | 72.1 | 72.3 | 72.5 |
| Seat Tube Angle (degrees) | 74.6 | 74.3 | 73.9 | 73.5 | 73 | 72.5 |
| Bottom Bracket Height | 27 | 27 | 27.2 | 27.2 | 27.5 | 27.5 |
| Wheelbase | 99.9 | 101 | 100.4 | 101.4 | 102.5 | 104.1 |
| Chainstay | 41.3 | 41.3 | 41.3 | 41.3 | 41.3 | 41.3 |
| Fork Offset | 6 | 6 | 5 | 5 | 5 | 5 |
Sizing Notes
Measurements are stated in centimeters unless otherwise indicated.
How we measure bikes
- Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
- Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
- Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
- Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
- Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
- Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
- Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
- Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
- Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
- Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
- Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
- Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.
Review this Product
Adding a review will require a valid email for verification
Most Helpful Favorable Review
Most Helpful Critical Review
Customer Images
Bulletproof and Versatile
I was torn during my shopping process between this bike and the topstone 1. I was concerned that it wouldn't be great at climbing and it wouldn't handle well on gravel. I couldn't have been more wrong. I have already put 200 miles on the bike after only two weeks of use. The bike dominates on hills, flys on tarmac, and plows through gravel. The saddle is comfortable, the shifters are easy to use, and the drivetrain is smooth. This really is an all day endurance bike. I can comfortably recommend this bike to anyone, whether for a 10 minute commute or a 9 hour endurance ride.
Beautiful Bike
I love this bike so far. I did need to put a new saddle on but other than that it’s rides really well! fits great I’m 5’8, 165lbs with very long legs and a 56 fits great! I do wish it would come with touch up pint as there was a ding in the paint when I unboxed it. Overall love the handling and it’s so beautiful.
A comfortable road bike
I got this as a birthday gift from my other half after months of going from local bike shop to local bike shop looking for a suitable endurance bike. Each time leaving disappointed that the wait would be 3months to 1 year. REI had ready stock and we were able to collect within a week. The bike is as described with 105 components mostly except for FSA crank and TRP SpyreC mechanical discs brakes. The crank works fine and I actually prefer the mechanical brakes because the housing on the shifters is significantly smaller than on ones with hydraulic brakes. The selle-cannondale saddle is good enough for long-ish rides and fit me just right without pain or strain even after 25-30miles. After comparing high end aluminum framed road bikes with affordable carbon framed bikes, I am glad I decided to go with the aluminum. Weight difference is on average 2lbs but the modern aluminum frames feel just as laterally stiff as the carbon ones in my opinion. Definitely worth the cost saving to be spent in other areas such as lighter wheels and pedals. The ride feel of this bike is confidence inspiring, granted I was switching from a hybrid bike but had ridden a few road bikes in my day. Balance is excellent and enables me to tilt into the curves at significant speed. Tires have enough grip to give you the false idea that you can take that downhill curve just a bit quicker. Looks wise-the red paint (almost a candy red in the flesh) color did turn a few heads when on the bike paths. Even though the heads turned were almost exclusively 8-10yr olds. I especially love the subtle cannondale branding in minimalist text on the top tube instead of huge lettering on the down tube. May not be for everyone but it’s classy to be subtle. Overall I would give the bike an 8/10. Almost perfectly as expected. I would spend some money on wheels and pedals from here but that’s all I would change. Cannondale did a good enough job on this one.
Great Entry-level Road Bike
Bike is extremely great on paved roads and asphalt...confidence level deeps a little on gravel so proceed with caution. However, it is capable and doable for adventure lovers. I've upgraded the wheel set to Carbon without a hitch and had to upgrade the saddle. I did have a little issue with the stock rear wheel (Bent). However, very satisfied with Cannondale Synapse thus far...
Awesome Bike with a 105 Gear Set.
I love this bike. It is everything I wanted in a new rode bike. It's comfortable and I can ride for hours. The 105 gear set is great and for a bike at this price you can't beat it. After a month of heavy riding the bike needed adjusted and "tuned".. The REI store here in Omaha took care of that at no charge to me. I did swap out the seat to a better one for me. But that is my personal preference. You might like the seat that is on it. I just wanted one with a cutout.
Nice Bike
Rides great, it's light, rides fast and shifts smooth. I'm still getting used to this bike, it's fun to ride and I would recommend it to friends. This Cannondale Synapse comes equipped with very good components.
Comfortable but with some issues
Overall a decent bike. I like how comfortable it is: it seems that the fork and frame absorb very well the little bumps and vibrations and the riding position is nice. I think the 30mm tires are also helping (I usually ride with 25mm tires). Also the gearing is ideal for rider like me that likes to climb moderately steep hills. My relatively low rating is because of the issues with the front derailleur and the brakes. The brakes are not very effective and frankly no better than the rim brakes from an old entry level road bike I have. I did adjust the cable tension and after break-in they are a bit better but still barely adequate. As for the front derailleur: it was a total mess when I picked up the bike from the store. The cable tension adjustment screw was maxed out, the cable wasn't properly routed and the support bolt that adjust the derailleur alignment wasn't set. With that, the chain was obviously rubbing pretty much all the time, regardless of the speed. I did my best to adjust it myself following the Shimano dealer's manual but even after multiple attempts it was still not perfect. I thought about returning it since I bought this bike specifically because of the Shimano 105 groupset but decided to try replacing the front derailleur first. Rather than buying the same R7000 (107) model, I gave the R8000 (Ultegra) a try. This one worked way better and I was able to properly adjust it. Still not perfect when doing extreme cross-chaining but I can live with that. As for the sizing: I am 5' 9" with 31"/32" inseam and picked up the smallest available frame (54cm) and it is ok. I think 53cm would have been better but since it is no longer available...
Stick to the roads!
I've had this bike for about a year and I can honestly say stay away from gravel roads, especially loose gravel. The bike is great on pavement and asphalt but once you go off road proceed with caution. Performance wise you won't find a better bike for long endurance rides. Train smart and train often.
Disappointed in quality
The crankset has a clicking noise. Adjustments have not resolved that. Low and high gear use comes with additional sounds, asjustments are limited per the REI mechanic. The handle bar center post plug fell out, it apears to be missing a locking nut, that maybe causing the clicking noise. The bike is a lower priced entry level road bike. A 30 mile ride has me return with a headache from the noise. I would spend extra dollars and buy a better brand.
It meets all my needs.
I really like this bike, its 100 times better then the walmart bike I was riding. I like how it handles and the weight of this bike is nice. I bike a few times a week for exercise and this bike is perfect for that.i. sure there is better bikes out there but this bike meets all my needs and i would recommend this bike for a novice rider like myself.