25 Aldebaran DC
Shimano2025

Shimano 25 Aldebaran DC Tuning

Tuning Specs
Handle bore 7x4
Spool bearing sizes 3x10x4 | 3x10x4
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 mm
Recommended handle lengths
70–85 mm90–105 mm
Let’s tune your reel
Available variants
30 HG R
31 HG L
30 XG R
31 XG L

Matching tuning parts for your Aldebaran

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RL - Angelrollentuning - APEX Spulenlager Set für Shimano Aldebaran - ALDEBARAN 25 - RL-TNG APEX spool bearings with S30 ceramic balls, ABEC 9
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RL - Angelrollentuning - EDGE Spulenlager Set für Shimano Aldebaran - ALDEBARAN 25 - Mit Abdeckung - RL-TNG EDGE Spool Bearing Set open without shield: two hybrid ceramic ball bearings
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RL - Angelrollentuning - CORE Spulenlager Set für Shimano Aldebaran - ALDEBARAN 25 - RL - Angelrollentuning - RL - TNG Stainless Steel Ball Bearing Set | ABEC 5 | Shimano | 5x11x4 | 3x10x4 - Bundle -
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Two metal ball bearings from the Hedgehog Studio "Kattobi" Tuning Kit Ceramic Ball Bearings for Shimano 1030 & 1030 Air are shown side by side on a plain white background, each with a visible inner ring of balls.
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Two round red wheels with visible metal bearings, resembling the Hedgehog Studio "Kattobi" Tuning Kit ball bearings for Shimano Air BFS 1030 & 1030, against a white background.
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Two ball bearings from the Hedgehog Studio "Kattobi" Tuning Kit (Shimano Air BFS-Si Ceramic 1030 & 1030) are shown side by side with "AIP BFS-SI", "1030AIR BFS-SI" and a Hedgehog Studio banner, perfect for upgrades.

The Shimano 25 Aldebaran DC (2025) is the first Aldebaran with a digital DC brake – combining an ultra-light BFS body, MGL Spool IV, and an intelligent 4×8 DC brake for stress-free casts with light to medium lures.

Frequently asked questions about tuning the Shimano 25 Aldebaran DC

Which spool bearings fit the Shimano 25 Aldebaran DC?
The Shimano 25 Aldebaran DC uses spool bearings in 3x10x4 (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 25 Aldebaran DC?
For the Shimano 25 Aldebaran DC 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 25 Aldebaran DC?
The handle fitting of the Shimano 25 Aldebaran DC is 7x4 (wrench size × shaft diameter in mm). Every tuning handle with a 7x4 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 25 Aldebaran DC?
Yes. On the Shimano 25 Aldebaran DC 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 25 Aldebaran DC?
Yes. Send us your Shimano 25 Aldebaran DC, 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.