Speed Tests: Zwift’s Fastest TT Bike Frames

Speed Tests: Zwift’s Fastest TT Bike Frames

Of all the cycling disciplines, time trialists seem most obsessed with how equipment and setup affect their speed. And for good reason! The TT is the “race of truth” where you don’t get to hide in the draft or play cat and mouse with other riders. When it’s just you versus the clock, you want the very best bike for the job.

Zwift’s release of the Drop Shop opened up a whole new universe of TT frames, taking us from just one (the “Zwift TT”) to 15+ options! Now all the TT racers are asking which TT frame is best?

We’ve been hard at work in our lab testing wheels and frames, and this is the second in a series of posts giving you some solid, data-driven answers. Read more speed tests here >

*First, a Disclaimer

The “which bike frame or wheelset is fastest” question isn’t as easy to answer as you might think. Each piece of equipment has unique weight and aerodynamic (CdA) values, making them perform in ways that mirror outdoor physics. Lighter items perform better on climbs, while more aerodynamic items perform better on the flats. Differences between options will also be magnified or minimized by your own power levels, drafting abilities, and more.

Your best Zwift setup, more than ever, depends on your specific situation.

About the Results

Below you will find the three fastest TT frames in game for flat and rolling courses. “Flat and rolling” covers most routes on Zwift, with the exception of anything including major climbs like Alpe du Zwift, the Epic KOM, or Innsbruck’s KOM. This isn’t an exact science, but we’re pretty confident in our findings thus far.

This list is based on our recent speed tests using the Tempus Fugit route which is almost perfectly flat. We’ve found that the best performers on flat routes are also the best performers on routes with shorter, rolling hills.

Your Winners

#1: Canyon Speedmax CF SLX Disc

891,000 Drops to purchase, must be Level 26+

The newest TT frame in Zwift, the Speedmax CF SLX Disc is significantly faster than any other frame in game.

#2: Felt IA

IA: 1,065,000 Drops to purchase, must be Level 37+

The Felt IA turns in nearly the same performance as the Cervelo PX-Series on flat/rolling routes and Alpe du Zwift, best the Cervelo by just 0.5s in both tests.

#3: Cervelo PX-Series

PX-Series: 1,065,000 Drops to purchase, must be Level 45+

According to Cervelo, “The PX-Series is faster and more aerodynamic than any other triathlon bike we have tested.” That seems to almost apply in Zwift as well, where the PX-Series is quite is slippery.

#4: Specialized Shiv Disc

994,000 Drops to purchase, must be Level 18+

The radical non-UCI legal frame was created to win at Kona. Optimized for crosswinds, with a distinctive tailfin water reservoir, the Shiv Disc was unveiled at Ironman Kona 2018.

#5: Cervelo P5

710,000 Drops to purchase, must be Level 15+

The precursor to Cervelo’s P5x, the P5 is a might fast frame on its own, just 7 seconds behind the P5x in our ~50 minute flat tests. As the most affordable TT bike on this short list, with the lowest level unlock, it’s a good buy for any Zwift TT racers.

#6: Ventum One

482,800 Drops to purchase, must be Level 31+

Who needs a downtube? A groundbreaking frame design when it was released in 2016, the Ventum One is quite speedy on Zwift’s flats. It’s a heavy frame, though: the heaviest TT frame in Zwift, in fact. So don’t use it on any hill climbs!

What’s the Time Gap?

The frames above are separated by only 13.5 seconds on a ~50 minute test on Tempus Fugit route at 300 watts with a 75kg rider (see stats). That may seem like a slim margin, but that’s significant in a TT effort!

The next fastest frame is 3.5 seconds behind the Ventum One, so the frames above are truly in a group by themselves when it comes to speed on flat courses.

About TT Frames

TT frames cannot draft on Zwift, so while the frames above turn in faster times than any non-TT setup in our solo rider tests, you would not want to use them in a standard Zwift race which includes drafting because you’ll get dropped!

Use these frames for TT racing and any solo training where you want to look and feel fast.

What about Climbing?

Time to climb? You’ll want a different frame than those listed above because as cyclists know, weight (not aero) is what matters on longer, steeper climbs! Here’s the list of top climbing TT frames on Zwift >

Share Your Thoughts

We hope all you TT fanatics found this post useful. Got questions or comments? Post below!


  • September 19, 2021: moved the Felt IA to #2 and the Cervelo PX-Series to #3 based on fresh test data.
  • March 23, 2021: added the Canyon Speedmax CF SLX Disc as #1. Kept the other frames on the list.
  • November 6, 2019: added the Ventum One as #5 on the list. Updated #1 and #2 to be a tie after further testing on Tempus Fugit.
  • June 6, 2019: added Felt IA as #1. Kept the other 3 frames on the list.

About The Author

Eric Schlange

Eric runs Zwift Insider in his spare time when he isn't on the bike or managing various business interests. He lives in Northern California with his beautiful wife, two kids and dog. Follow on Strava

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1 year ago

Where’s Canyon’s Speedmax SLX??? Multiple IM winner with Jan Frodeno and Patrick Lange?

Wesley Stocker
Wesley Stocker (@pharaway)
1 year ago

I just did a group ride on a TT Bike (Group for motivation / speed pacing) to complete the TT portion of the OSPW Challege. While true that I was not getting a draft, it very much appeared that I was at least creating one. I would put out 2.4-2.8 typically and people were able to sit-on at 1.8-2.2. Was I seeing things or is this correct that the TT Bikes do not benefit their rider with a draft, but they give a draft to those behind them?

Aidan Healy
Aidan Healy
1 year ago
Reply to  Wesley Stocker

I think the idea is you use a TT bike if you want to test yourself against the terrain without the traffic impacting your results. For everyone else, it’s business as usual.
Seems fair enough to me.

Leszek Prozorowicz
Leszek Prozorowicz (@lprozorowicz)
10 months ago

Recently, Zwift has updated the TT frames (Pinarello Bolide / TT, Cube Aerium, BMC Timemachine01, Diamondback Andean) don’t you think it’s worth updating the TT frame ranking?

Daniel Strigberger
Daniel Strigberger
9 months ago

I’m looking for a good bike to ride down the radio tower and hit 100km/h. Is the stock Zwift TT with Zipp 808 faster than the Canyon Aero 2021 with 808s for this purpose?

Daniel Strigberger
Daniel Strigberger
9 months ago
Reply to  Eric Schlange

Thanks for the quick reply. PS. Still new to Zwift (4 months in) and I visit your site daily. Amazing resource!

8 months ago

Does the shiv disc outperform the s-works shiv with 808’s?

7 months ago

Surely the tron Is the quickest on a flat route than any tt bike.

A zwifter
A zwifter
5 months ago

Just when I buy the P5X and Felt IA I check the speed results again and the canyon is faster 😥

D QCW (@darren-r-linkin)
5 months ago

Did TOW #3 short (B) ride on this and on Tron and am wily drafter (it’s someone else’s job to close gaps not mine), and about 20-25 watts difference. Didn’t plan on it, messy not constant power, lots of caveats, but while drafting seemeed to be not worth it (often I’d get going and boom they’d turn off) had to work about 10% harder for same time (can pull more #’s data but 212 vs. 230’s?). Not having the sticky draft WAS AMAZING on a TT bike such a relief! But also would catch groups and…wow could really feel the… Read more »

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