BIKE FIT CONSUMABLES: STEMS & SEATPOSTS

The stem and the seatpost are the most commonly replaced pieces of equipment during a bike fit. That's why they are called bike fitting consumables.

For this reason, we carry in stock a full-line of stems and seatposts, in case you have a need for them - not everyone does.

We carry the European brand Forza. It's a great quality product with color choices and size range to address most people.

You are welcome to bring your own spare parts to your bike fitting session.

We are not engaged in sales. We find that the process of sales can put in question the trust between the bike fitter and the customer. We want to keep this trust between ourselves and our customers sacred.

So, we provide what's needed, when needed - and nothing more.

In case you want a specific part/brand that we don't offer, we can refer you to your favorite bicycle store or connect you with a bike shop that offers our customers special discounts - we work with several.

 

WHY SEATPOSTS?

The seatpost is the most critical component in the bike fitting process: it supports the position of a cyclist in the saddle. It determines the relationship to the bike with respect to the seat height and forward/aft position - which is also related to the length of the cranks and the bike geometry.

The height of the seat determines the leg extension, which is related to comfort and power. The forward and aft saddle position (together with its tilt) is related to the health of the knee and lower back comfort.

Most bicycle manufacturers install setback seatposts on new bikes to extend the range of bike fit positions possible.

This is usually to address taller riders who, being on the edge of two bike sizes, prefer to ride a smaller, more responsive bicycle.

Ultimately, during the bike fitting process, the position of the saddle on the seatpost is determined by what we call the "power" portion of the bike fit. During this part of the bike fit, your position in the saddle (height and forward/aft) is determined, so you deliver the most power, most efficiently and while biomechanically neutral for injury prevention.

More often than not, we find that a 0 offset  seatpost (AKA straight) is better suited during the fit process.

If the bike is the appropriate size for a rider's body, it's very likely that he/she will fit on a 0 offset seat post, and the saddle rails will be positioned between 1/3 and 1/2 of the max range.

 

 

 

                

SWITCHING SEATPOSTS

 

Especially true for mountain bikes (but also road), it's advisable to avoid a saddle pushed all the way forward or back. This maxes out the rail flexibility and, potentially, begins the stress cycle of material fatigue that can lead to catastrophic failure of the saddle rails. it's wiser to use a seatpost that places the saddle as close as possible to near the middle of the rails.

 

Tri and track bikes are the exception.

Special cases also.

       

WHY STEMS?

The positing of a cyclist's upper body is related to the position of the handlebar. This, in turn, is dictated by the stem length and rise (the angle).

The handlebar location is called the handlebar reach and stack and it's very personal to each individual -varying with each rider's body anatomy and limb length. Stems are routinely changed during the fit. Stem are critical to achieving the proper position on the bike for comfort and power.

Manufacturers install on a new bicycle a generic stem length that is appropriate for the 95 percentile human.

The process of sizing the stem during the bike fitting process is determined during what we call the ";cockpit comfort" portion of the bike fit.

In our bike fitting practice, we make the upper body participate in the power delivery of the pedal stroke, making the sizing of the stem critical to added performance.

Beyond power, there is the all-important aspect of rider comfort. Most of lower back, hands and neck discomfort are linked to the incorrect sizing of stem.

 

 

 

                

STEMSSS

 

The stem determines the comfort of your upper body. The correct stem length and position will resolve much of the hands pain and lower back discomfort.

 

The length of the stem (together with the handlebar reach) is also directly responsible for the handling of the bike.

OUR APPROACH TO BIKE FIT CONSUMABLES:

We are positively not engaged in sales - or philosophy is that sales can taint the fit process. .

You are more than welcome to bring your own spare parts to the fit session. If they happen to be the right size, we'll gladly use them.

You leave the studio with a complete fit and that means that you may require a bike fitting consumable. For this reason, we provide a selection of components for your convenience, with choices addressing both pricing and performance.

OUR PRODUCT STOCK:K:

  • Qualityty

  • Weight

  • Options

  • Price

 

The Forza stems and seatposts are light, look great on the bike, come in all sizes and, most of all, are very affordable.

We chose these stems and seatposts:

STRATOS - As light as most carbon. More reliable. Low cost.

CIRRUS PRO - Lighter than carbon. More reliable. Affordable

Aluminum Shaft. Dual bolt micro adjust clamp. Road and MTB

Carbon Shaft. Dual bolt micro adjust clamp. Carbon top clamp. Road only

These are the options we chose for our studio's needs. Other sizes and colors may be available by special-order.r.

 

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