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Tacx FLUX 2 vs Wahoo KICKR CORE 2: which smart trainer fits you
Tacx FLUX 2 vs Wahoo KICKR CORE 2: brand US prices, what is in the box, cassette fit and Zwift virtual shifting.
At a glance
Short answer: Get the Wahoo KICKR CORE 2 ($549.99) if you want a trainer that works the day it arrives, or Zwift's virtual shifting. Get the Tacx FLUX 2 ($499.99 on sale at Garmin, normally $699.99) if you want the lower price and the bigger power claim, and you don't mind buying a cassette for it.
Who it's for: riders choosing their first direct-drive smart trainer at around $500.
The quick comparison
Both are direct-drive trainers: your rear wheel comes off and the bike sits on the trainer's own cassette or cog.
| Tacx FLUX 2 | Wahoo KICKR CORE 2 | |
|---|---|---|
| US price (brand store, 27 Oct) | $499.99 sale, list $699.99 | $549.99 |
| Comes with | No cassette | 11-speed cassette, or Zwift Cog and Click (same price) |
| Max power | 2000 W | 1800 W |
| Max climb | 16% | 16% |
| Max descent | Not stated | -10% |
| Power accuracy | Within 2.5% | +/- 2% |
| Flywheel | 7.6 kg | 5.4 kg (Zwift store) |
| Trainer weight | 23.6 kg | 13.6 kg (Wahoo product page) |
| Max rider weight | Not stated | 113 kg (Wahoo) |
| Connections | ANT+ FE-C, Bluetooth | Wi-Fi, Bluetooth, ANT+ FE-C |
| Zwift virtual shifting | Not on Zwift's Cog list | Yes, with the Cog version |
| Warranty shown | Not on the product page | 1 year (Wahoo) |
"Power accuracy" is how close the trainer's own wattage reading should be to the real figure. ANT+ FE-C and Bluetooth are the two ways apps and bike computers talk to and control a trainer.
Price and what you actually pay
Tacx FLUX 2. Garmin's US store showed $499.99, marked SALE, against $699.99 ("Save $200.00 USD"), with the line "Note: Cassette not included". So the real spend is $499.99 plus a cassette that matches your bike. The box has room for one; it just doesn't have one.
KICKR CORE 2. Wahoo sells two versions at $549.99: with an 11-speed cassette (11-28) and with Zwift Cog and Click. Zwift's US store also sells the Cog version at $549.99, plus a "$40 shipping charge applied at checkout".
What's in the box
| Tacx FLUX 2 (Garmin product page and manual) | KICKR CORE 2 (Wahoo product pages) |
|---|---|
| Trainer and front legs, bolts, washers, 8 mm hex key | Trainer and legs (some assembly required) |
| Shimano/SRAM cassette body (the part the cassette slides onto) | Either an 11-28 cassette plus 1.8 mm spacer, or a fitted Zwift Cog plus a Zwift Click shifter |
| Cassette spacer ring | AC power adapter |
| Quick-release skewer and 135 mm end cap | Quick-release adapters for 130 and 135 mm hubs |
| 12 x 142 and 12 x 148 mm thru-axle end caps | 12 x 142 and 12 x 148 mm thru-axle adapters |
| Power cable, 1-month Tacx Premium software |
Will it fit your bike?
Axles. Both take quick-release hubs (130 or 135 mm) and 12 x 142 or 12 x 148 mm thru-axles out of the box.
Cassettes. The FLUX 2's standard body takes 8 to 12-speed Shimano and SRAM cassettes made for a standard Shimano-style body, per Garmin's manual and support page. For other cassettes Garmin sells swap-in bodies at $129.99 each, and each one lists the FLUX 2 as compatible:
- SRAM XD/XD-R body: 11, 12 and 13-speed SRAM XD and XD-R cassettes.
- Shimano MICRO SPLINE body: 11 and 12-speed Shimano cassettes with a 10-tooth smallest cog.
- Campagnolo body: 9 to 12-speed Campagnolo cassettes.
The CORE 2 takes Shimano HG cassettes as it comes, with replaceable bodies for SRAM XD/XDR and Campagnolo. Wahoo says it is "not compatible with Shimano Micro Spline" and that its stock cassette doesn't suit Shimano CUES or LinkGlide drivetrains.
Zwift and virtual shifting
Virtual shifting means one fixed cog on the trainer, with gear changes done in software from a small handlebar remote (Zwift Click).
Zwift's compatibility list names the KICKR CORE 2 both as a Zwift Ready trainer (sold with Cog and Click) and as Cog Compatible. The Tacx FLUX 2 is on neither list. Garmin still names Zwift and TrainerRoad as apps the FLUX 2 works with; you just shift with your bike's own gears.
Which one fits you
- Lowest price today, one bike, real gears. Tacx FLUX 2 at $499.99, as long as the sale holds and you add a cassette.
- Want it working the day it arrives. KICKR CORE 2 at $549.99, either version.
- Zwift with virtual shifting, or several bikes in the house. KICKR CORE 2 with Zwift Cog and Click.
- Big sprinters who want the highest listed power. FLUX 2 (2000 W vs 1800 W).
- Shimano 12-speed MICRO SPLINE cassette (many 1x gravel and mountain bikes). FLUX 2 plus Garmin's $129.99 MICRO SPLINE body if you want your own cassette on the trainer. Wahoo says the CORE 2 can't take one, so there the Cog version is the way round it.
- Still deciding on the type of trainer. Start with the smart trainer buying guide.
Related on Pedal Brief
- Smart trainer buying guide: direct drive vs wheel-on
- Zwift Cog compatible trainers
- Wahoo KICKR CORE 2 vs Van Rysel D500
- Smart trainers by price
Sources and notes
Where the sources disagree
- FLUX 2 cassette range. Garmin's US product specs list "Shimano/SRAM 9 to 11 speed" plus "Shimano 12-speed Hyperglide+", and the In the Box tab lists a "SHIMANO/SRAM 9-11 cassette body". The FLUX 2/S owner's manual says to use the standard body "with a spacer" for "Shimano or SRAM 8, 9, or 10 speed" and "with no spacer" for "Shimano or SRAM 11 or 12 speed". Garmin's FLUX setup support page says "Any 8 to 12 speed Shimano or SRAM cassette can be placed on this cassette body."
- CORE 2 drivetrain range. Wahoo's product pages say "8 to 13-speed drivetrains". Wahoo's KICKR CORE 2 Information & FAQ lists the drivetrain as "without cassette, with 8-12 speed Shimano-compatible cassette, or Zwift Cog + Click".
- CORE 2 weight. Wahoo product pages: "30 lb / 13.6 kg". Wahoo FAQ: "Weight (Unboxed): 43.5 lbs / 19.7kg". Zwift store: "Product Weight: 19.7 kg". No source explains the gap, so compare trainer weights with care.
- CORE 2 max rider weight. Wahoo: 250 lb / 113 kg. Zwift store: 114 kg.
- CORE 2 warranty. Wahoo product pages: "1-year warranty". Zwift store, Cog version: "Includes a 2-year limited warranty." Neither says whether it depends on the shop.
What we could not confirm
- FLUX 2 descent simulation, max rider weight and warranty. Not on Garmin's US product page or in the owner's manual.
- FLUX 2 sale end date. Garmin showed the sale price on 26 and 27 October with no end date.
- Whether the 23.6 kg FLUX 2 weight is boxed or unboxed. Garmin's spec table says only "WEIGHT 52 lbs (23.6 kg)".
- Noise. Garmin calls the FLUX 2 "one of the most silent flywheel-equipped bike trainers available". Neither brand gives a decibel figure, so "quiet" is doing a lot of work on both sides.
- CORE 2 flywheel weight on Wahoo's own pages. The 5.4 kg figure is from Zwift's store.
- Out-the-door cost. Sales tax depends on your address; Wahoo's pages showed "Fast delivery" with no shipping dollar figure.
Sources
- Garmin: Tacx FLUX 2 Smart Trainer (US store, specs, in the box), Tacx SRAM XD/XD-R Body (Type 2), Tacx Shimano Micro Spline Body (Type 2), Tacx Campagnolo Body (Type 2), Setting up a FLUX Series Smart Trainer, Tacx FLUX 2/S Owner's Manual PDF, Owner's Manual: Mounting the Cassette
- Wahoo: KICKR CORE 2 with 11-speed cassette, KICKR CORE 2 with Zwift Cog and Click, KICKR CORE 2 Information & FAQ
- Zwift: KICKR CORE 2 with Zwift Cog and Click (US store), Zwift Ready and Zwift Cog Compatible Trainers
All checked 27 October 2026 (Europe/Copenhagen).
Disclosure: Pedal Brief may earn a commission if you buy through links on this page, at no extra cost to you. This version has no affiliate links. We have not tested these trainers. Every price and spec below comes from the brand's own store, product page, support page or owner's manual, is linked, and was checked on 27 October 2026 in US dollars. Full disclosures.