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Cycling Weekly’s review found that No.6’s G45R gravel wheelset weighed 1,198g with rim tape and delivered responsive acceleration, climbing and handling during testing. The reviewer also reported that a stone strike splintered a carbon spoke, raising a durability concern for off-road use. The review does not provide pricing or long-term reliability results.
Cycling Weekly’s review of the No.6 G45R gravel wheelset found that the carbon wheels delivered quick acceleration, climbing response and nimble handling in testing, but also reported that a stone strike splintered one carbon spoke during a race. The result presents the 1,198-gram wheelset as a lightweight option with appealing ride characteristics and a durability question for riders on rough terrain.
The G45R is No.6’s lightest gravel wheelset and belongs to the company’s ProjectSpeed range. Its hooked carbon rims use Toray T700 and T800 fibre and measure 45mm deep. The front rim is 34.5mm wide externally and 28mm internally; the rear is 33mm external and 26mm internal. No.6 claims a weight of 1,195g. Cycling Weekly measured 1,198g with rim tape, without valves or lockrings.
The wheelset uses No.6’s Zero Gravity v.3 hubs, with a 45-tooth ratchet engagement system and Tripeak ceramic bearings. The front wheel has 16 carbon spokes and the rear has 20. No.6 lists compatibility with Shimano, SRAM and Campagnolo hub types, recommends tyres 40–50mm wide, and sets a maximum rider weight of 110kg and maximum pressure of 110 PSI. The review says valves, lockrings and pre-applied rim tape are supplied.
Reviewer Andy Turner tested the wheels with Pirelli Cinturato Gravel M tyres in 45mm and 50mm sizes, including riding at The Gralloch UCI gravel race and on Forest of Dean terrain. He praised the wheels’ quick response during climbing, braking and direction changes. However, a stone hit at The Gralloch splintered a spoke. The reviewer noted that No.6 supplies replacement front and rear spokes, but argued that carbon spokes are less suited to gravel than alloy ones because of their vulnerability to side impacts.
Light Weight Meets Gravel Durability
The review highlights a trade-off relevant to riders choosing race-oriented gravel equipment: lower wheel weight and rapid response can improve the feel of accelerations and climbs, but gravel surfaces expose wheels to impacts that are less common on paved roads. The reported spoke damage occurred during a single test, so it does not establish a broader failure rate. It does, however, give prospective buyers a concrete durability concern to weigh against the wheelset’s ride performance.
The rim dimensions also shape the intended use. No.6 recommends 40–50mm tyres, while the reviewer said the narrower front rim may not be aerodynamically optimal with a 50mm tyre. He considered the possible aerodynamic savings marginal at the race speeds he experienced, which averaged just over 32km/h at The Gralloch. The review’s main performance case is responsiveness, rather than a measured aerodynamic advantage.
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A Race-Focused No.6 Design
No.6 is a Chinese wheel brand that Cycling Weekly described as having built a reputation for lightweight carbon wheels. The publication said independent testing had found earlier products comparable with offerings from established European and US brands; that is the outlet’s characterization, not a claim independently verified in this review.
The G45R’s “R” designation refers to its race-focused design. Compared with No.6’s wider G45W model, its narrower rim profile is intended to reduce weight. The company’s ProjectSpeed line is aimed at lightweight wheels with quick acceleration and responsive handling. The review tested those qualities in mixed riding, but did not present laboratory measurements of aerodynamic drag, bearing efficiency or comparative lap times.
“For climbing, they are frankly dreamy.”
— Cycling Weekly reviewer Andy Turner
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Price and Long-Term Reliability
The supplied review material does not state the G45R’s price, warranty terms or replacement-spoke cost, which limits comparisons with other wheelsets. It also does not report long-term testing or enough incidents to establish how often carbon spokes might be damaged in ordinary gravel riding. The single spoke strike is a reported test event, not evidence of a general defect.
The review offers no measured aerodynamic comparison or quantified benefit from the ceramic bearings. It describes the wheels as feeling comparable to other high-end models the reviewer had ridden, but does not provide controlled test data to establish equivalent performance.
Shimano compatible gravel wheelset
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What Buyers Should Check
Readers considering the G45R can compare the complete wheelset price, warranty and spare-spoke availability with competing options, then match the rim widths and pressure limits to their tyres and riding conditions. The stated 110kg rider limit and maximum pressure of 110 PSI should be checked against the intended setup. Riders prioritizing impact resistance may want to ask a dealer or No.6 about spoke replacement and service procedures before purchase.
No further test results or company response to the reviewer’s spoke-damage report are included in the source material. Longer-term durability data and details on repair support would help clarify how the lightweight design performs beyond the review period.
gravel bike wheel replacement spokes
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Key Questions
How much does the No.6 G45R wheelset weigh?
No.6 claims 1,195g. Cycling Weekly measured 1,198g with rim tape fitted, but without valves or lockrings.
What tyre widths does No.6 recommend?
No.6 lists an optimal tyre-width range of 40–50mm. The reviewer tested 45mm and 50mm Pirelli Cinturato Gravel M tyres.
Did the review find a durability problem?
The reviewer reported that a stone strike during The Grallock splintered one carbon spoke. That is one test incident and does not establish a general failure rate. No.6 supplies spare spokes, according to the review.
What are the G45R’s stated limits?
No.6 lists a maximum rider weight of 110kg and a maximum tyre pressure of 110 PSI. Riders should confirm that these limits suit their setup.
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