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Live · checked today · 4 UK retailers tracked
Callaway B21 Driver vs Mizuno ST-G Driver — Generation Unknown
Quick verdict
Checked daily across 4 UK retailers
Price and availability verdict
Callaway B21 Driver is currently £169.95 used, while Mizuno ST-G Driver — Generation Unknown is currently £179.95 used. Against tracked history, Callaway B21 Driver is at its lowest tracked price and Mizuno ST-G Driver — Generation Unknown is 6% above its lowest tracked price. Callaway B21 Driver is currently available from 1 UK retailer, versus 4 for Mizuno ST-G Driver — Generation Unknown.
Mizuno
ST-G Driver — Generation Unknown
£179.95 used No change 36% below usual Buy £179.95 → at Affordable GolfMizuno
ST-G Driver — Generation Unknown
£179.95 used
at Affordable Golf
Deal intelligence
Should you buy now, or wait?
The Callaway B21 Driver is at its lowest tracked price today. The Mizuno ST-G Driver — Generation Unknown has more room: its tracked low is £169.95.
Callaway · B21 Driver
Not enough data yet
Today £169.95 · typical £199.95 · lowest £169.95
Mizuno · ST-G Driver — Generation Unknown
Not enough data yet
Today £179.95 · typical £214.95 · lowest £169.95
On sale 2 times in the last 4 months
Head to head
Category leaders, from the data on this page
- Cheapest new B21 £169.95 vs £179.95
- Closest to its tracked low B21 0% above vs 6%
- Most retailers in stock ST-G Driver — Generation Unknown 4 vs 1
- Cheapest used B21 from £169.95 vs £179.95
Where to buy
4 UK retailers, checked daily
Price trajectory
How each has moved since we started tracking
Lowest tracked price per day, any condition. Caddence tracks both daily. Shaded spans are days we couldn’t collect prices — the lines break rather than guessing.
Callaway · B21 Driver
↓ £30
since 9 April 2026
Lowest £169.95 on 18 August 2026
Mizuno · ST-G Driver — Generation Unknown
↓ £39.05
since 9 April 2026
Lowest £169.95 on 15 April 2026
New vs used
From used listings we track
Callaway · B21 Driver
NEW £169.95
USED FROM £169.95
Mizuno · ST-G Driver — Generation Unknown
NEW £179.95
USED FROM £179.95
Availability by build
Which configurations are in stock right now
| Build | Callaway B21 Driver | Mizuno ST-G Driver — Generation Unknown |
|---|---|---|
| Stiff · 9.5° · Used | — | 3 retailers · from £179.99 at Nearly New Golf Clubs → |
| Regular · 9.5° · Used | — | 2 retailers · from £190.95 at Replay Golf → |
| Regular · 9° · Left-hand · Used | 1 retailer · from £169.95 at Replay Golf → | — |
| Extra Stiff · 9° · Used | — | 1 retailer · from £179.95 at Affordable Golf → |
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Common questions about the Callaway B21 Driver vs Mizuno ST-G Driver — Generation Unknown
Prices shown are the cheapest in-stock price per retailer tracked by Caddence, updated daily. Always confirm the final price on the retailer's site.