21 Gekkabijin Air TW PE Special
Daiwa2021

Daiwa 21 Gekkabijin Air TW PE Special Tuning

Tuning Specs
Handle bore 8x5
Spool bearing sizes 3x6x2.5 | 3x6x2.5
Recommended bearing class Apex
Pin Remover Erforderlich
These sizes are precisely tailored to the reel — we’ve deliberately hidden the others so you can find the right tuning parts straight away.
Recommended knob sizes
18–20 mm21–24 mm25–27 mm
Recommended handle lengths
70–85 mm90–105 mm
Let’s tune your reel
Available variants
8.5 R
8.5 L

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Two metal ball bearings from the Hedgehog Studio "Kattobi" Tuning Kit Ceramic Ball Bearings | Daiwa 630 & 630 Air lie side by side on a white background, with the Hedgehog Studio brand and the stylized AIR logo.

The Daiwa 21 Gekkabijin Air TW PE Special is a BFS saltwater baitcaster with an aluminum body, HyperDrive design, T-Wing system, and 28mm G1 Duralumin PE-Air spool for Aji and Mebaru light tackle with PE line. 165g, 8.5:1, 3.5kg drag, 12+1 bearings. Released only in 8.5:1, right and left.

Frequently asked questions about tuning the Daiwa 21 Gekkabijin Air TW PE Special

Which spool bearings fit the Daiwa 21 Gekkabijin Air TW PE Special?
The Daiwa 21 Gekkabijin Air TW PE Special uses spool bearings in 3x6x2.5 (both spool bearings the same size) (inner × outer × width in mm). You'll find matching tuning spool bearings in exactly this size on this page under the tuning parts. To swap them on this reel you need a Pin Remover, because the bearings are secured to the shaft with pins.
Which bearing class do we recommend for the 21 Gekkabijin Air TW PE Special?
For the Daiwa 21 Gekkabijin Air TW PE Special we recommend APEX, our highest tuning level. It gets the maximum casting distance and smoothness out of the reel and is especially worth it if you cast light lures or want every last bit of performance. The recommendation is based on how this reel is typically used.
Which handle and knobs fit the 21 Gekkabijin Air TW PE Special?
The handle fitting of the Daiwa 21 Gekkabijin Air TW PE Special is 8x5 (wrench size × shaft diameter in mm). Every tuning handle with a 8x5 fitting fits directly. Tuning knobs in the sizes shown on this page fit the stock handle and our tuning handles.
Do I need special tools to change the bearings on the 21 Gekkabijin Air TW PE Special?
Yes. On the Daiwa 21 Gekkabijin Air TW PE Special the spool bearings are secured to the spool shaft with pins. A Pin Remover lets you pull the pins out cleanly without bending the shaft. Apart from that you only need a suitable screwdriver for the side plate.
Can you install the tuning on my 21 Gekkabijin Air TW PE Special?
Yes. Send us your Daiwa 21 Gekkabijin Air TW PE Special, we'll install the tuning parts professionally, clean and oil the reel and send it back ready to fish. You'll find the tuning service via the button above.