BioFlex OnGel Men's Athletic Saddle SR4331H

The BioFlex OnGel Men's Athletic Saddle SR4331H is a gel-padded replacement saddle with an ozone cut-out, listed at 283 x 179 mm. The manufacturer says its gel moulds to sit-bone shape and absorbs shock, while customer feedback reports comfort and fit, though individual suitability will depend on the rider and bike setup.

At a glance

Manufacturer says the OnGel insert moulds to sit-bone shape and absorbs shock.
An ozone cut-out is claimed to provide increased pressure relief.
Reflective panels are claimed for added visibility in low-light conditions.
The listing describes compatibility with easy-clip packs and lights.

Price

£17.23Save 17%

Reference price: ~~£20.70~~

Price checked: 13 Nov 2026

View offer

Often bought together

Bioflex Ladies OnGel Ozone Athletic Saddle - Black

£23.99

Pros and cons

Pros

Gel padding and the central cut-out offer a comfort-focused design for riders seeking pressure relief.
Customer feedback specifically reports comfort, fit and quality, including a report of a comfortable 20-mile ride.
The saddle's listed dimensions and weight help buyers compare its size and heft with an existing seat.

Technical specifications

12 specifications

Identity
Brand	BioFlex
Model	SR4331H
Bike type listed	Road Bike

Dimensions and installation
Dimensions listed	28.3L x 17.9W x 6H centimetres
Weight listed	500 Grams
Easy-clip accessory compatibility	Compatible with easy clip packs & lights

Materials and design
Material listed	Gel, Steel, Vinyl
Outer material	Vinyl
Pad type	Gel Pad
Colour	Black

Capacity and support
Maximum weight capacity	150 Kilograms
Warranty listed	1 Year Manufacturer

What to know before buying

Listing details to confirm

Dimensions are presented in two forms: 28.3L x 17.9W x 6H centimetres in the details and 283x179mm (LxW) in the feature text. The listing calls the bike type Road Bike but manufacturer copy discusses a men's athletic saddle, so confirm fit and intended riding position for your bike before buying. It also mentions reflective panels only in the product description, while the listed included component is a saddle.

What’s in the box

Included

1 saddle

Who is it for?

A good fit for

Road cyclists looking for a gel-padded replacement saddle with a pressure-relief cut-out.
Riders who value customer-reported comfort and fit, while recognising that saddle comfort varies by person.
Buyers whose clip-on pack or light uses the stated easy-clip compatibility.

Less suited to

Riders who need confirmed fit dimensions or rail specifications before purchase, as no rail measurements are supplied.
Buyers seeking evidence of long-term durability or independent testing, which the listing does not provide.

BioFlex OnGel Men's Athletic Saddle SR4331H · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 93 ratings

5 stars62%62%
4 stars19%19%
3 stars10%10%
2 stars4%4%
1 star5%5%

Customer feedback highlights comfort, fit, quality, value and appearance. One reported comfortable riding over 20 miles and another noted pressure relief in the prostate area. These perceptions are relevant to a gel saddle designed around pressure relief, but they do not establish a universal fit or confirm performance for every rider. Ratings are mostly in the higher star categories, with some lower ratings also present, and do not explain individual experiences.

Positive themes

Customers report comfort, fit and quality.
Feedback includes a report of comfort on a 20-mile ride and a mention of pressure relief.

Frequently asked questions

What does the OnGel insert claim to do?

The manufacturer says it moulds to sit-bone shape and absorbs shock. That is a product claim, not a guarantee of comfort for every rider.

What are the saddle's listed dimensions?

The details give 28.3L x 17.9W x 6H centimetres, while feature text separately gives 283x179mm (LxW). Confirm which measurements apply to the fit you need.

Can it be used with a clip-on pack or light?

The listing states compatibility with easy-clip packs and lights. Check that your particular accessory uses a compatible fitting.

What does customer feedback say?

Feedback highlights comfort, quality and fit, with a reported comfortable 20-mile ride. These are customer perceptions and do not establish that it will suit every rider.