Big Blue Book of Bicycle Repair
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Most Trusted Reviews
TRUST
- Verified Purchaser
- Take-Back Reviewer (5 deleted Reviews; avg. rating: 5.0)
- Critical Reviewer (avg. rating: 3.3)
Least Trusted Reviews
TRUST
- Verified Purchaser
- Single-Day Reviewer (posted all reviews on May 22, 2017)
- Overlapping Review History: reviewed 1 of 9 top products
- Overrepresented Participation (posted 4 Reviews)
- Easy Grader (avg. rating: 5.0)
Analysis Details
One-Hit Wonders
19 of the 185 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, it does not appear to have a significant impact on the overall rating.
Take-Back Reviewers
22 of the 185 reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.
Single-Day Reviewers
8 of the 185 reviewers have written multiple reviews but posted all of them on a single day. The Single-Day reviewers have rated this product an average of 5.0 while all other reviewers rated this product an average of 4.5. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
4.4 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
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- 61%
- From reviewers with an overrepresented participation
We see the following 2 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 112 reviewers (or 61%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
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- 2%
- Created over 1 day
We counted 185 reviews for this product over the span of 4,393 days, an average of 0.0 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 2 or fewer reviews on any given day.
However, we see the following 1 day exceeding this threshold:In total, we found that 3 reviews were created on just 1 day. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
27 of the 185 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.
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- 0%
- Have an overrepresented word count
Read more about our Word Count Comparison test.
12 of the 185 total reviews for this product use substantial repetitive phrases between them. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
5% also reviewed:
Zinn & the Art of Mountain Bike Maintenance by Velo Press
5% also reviewed:
Park Tool Master Link Pliers MLP-1.2 by Park Tool
4% also reviewed:
The Bicycling Guide to Complete Bicycle... by Brand: Rodale Books
4% also reviewed:
Zinn & the Art of Road Bike Maintenance: The... by Lennard Zinn
4% also reviewed:
Park Tool VC-1 Bicycle Tire Valve Core Tool by Park Tool
3% also reviewed:
Park Tool Professional Cable & Housing Cutter -... by Park Tool
3% also reviewed:
Venzo Bicycle Bike 1/4 Inch Driver - Torque... by Venzo
3% also reviewed:
Nature's Path Organic Toaster Pastries by Nature's Path
39 of the 185 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Brand Repeaters
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- 0%
- Admitted to receiving an incentive
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
- 0
- Reviews have been deleted
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
- We have no information on reviews that were never published in the first place.
- We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.