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Chapter 5: Perfect Fit and Ride
It is very important your new G Plus Mariner 7 is adjusted properly for your size and for comfort. The G Plus
Mariner 7 has multiple adjustments available to offer a comfortable and safe position for riding. A properly sized
and adjusted bicycle allows the rider to remain fully alert and avoid injury. Review this chapter carefully and all the
adjusting points of your new G Plus Mariner 7. If you have difficulty in obtaining the most comfortable riding position
or performing available adjustments, contact your authorized dealer for advice. You can contact Prodeco
Technologies directly by phone or email and we will assist you with the proper adjustments for your bicycle and
your size.
The following list is the areas of adjustability the G Plus Mariner 7 offers:
Saddle
height
Saddle
nose
angle
Saddle distance from steering tube and handlebar
Handlebar
height
Stem rise and rotation
Brake lever angle
Brake lever reach
Fork suspension firmness
a.
The basics
Understanding the basics to a bicycle frame size will help in determining the correct positions and adjustments for
your body size and comfort. The G Plus Mariner 7’s frame was designed to easily accommodate all riders from 5’ 6”
to 6’ 6” utilizing the available adjustments. The frame size can be considered anywhere from an 18” to 23” if
comparing to traditional measurements. The most important information to remember when sizing your bicycle is
that you are comfortable riding, especially when pedaling. With throttled electric bicycles some riders may choose
not to pedal and the measurement will be different than for a rider who chooses to pedal and is the same size.
Scooters for instance have a much lower saddle height than bicycles due to scooters not being pedaled. A higher
saddle height is only recommended for riders who pedal allowing them a full extension of their leg per rotation of
the crank.
b.
Frame size
The typical measurement number used today in deciding if a frame size is the correct size for a rider is the seat
tube length. This number usually begins around 17” for MTB style bicycles and can go as high as 25” for Road style
bicycles. MTB bicycles will usually be 10% smaller in number size for the same height rider when comparing to
Road sizes. The seat tube length is measured from the centerline of the crank (bottom bracket) to the top of the
seat tube (seat tube clamp). There is another measurement sometimes forgotten which is actually more important,
this is the top tube length (seat tube to the steering tube). Most manufacturers will proportionally adjust the top tube
length according to the seat tube length and with stems being available in various lengths, fine tuning of this
measurement is easily accomplished.
Prodeco Technologies G Plus Mariner 7’s frame measurement will differ from traditional bicycle frames due to the
seat tube being longer than a traditional bicycle.
The G Plus Mariner 7 battery base required an added mounting area to the seat tube, therefore the better way to
measure the seat tube is from the base of the saddle clamp (seat post must be inserted at the lowest position) to
the centerline of the crank. When measuring this way, the G Plus Mariner 7 would be considered an 17” frame.
Even though considered an 17” frame, the frame is unique in other areas, allowing for all size riders and adjustable
to be similar to a 21” road bike frame.
The G Plus Mariner 7’s has a high seat tube angle. With the high angle seat tube, as a tall rider raises their saddle
to accommodate their longer legs, the saddle will pull back offering a longer distance to the steering tube. For fine
detailed adjusting, the narrow seat post saddle clamp allows the saddle to be moved back or forward an additional
7.5mm each way.
c.
Recommended sizing
In today’s bicycle industry, the top tube length is actually more important than the seat tube length. With seat posts
now available over 300mm, the seat tube length is no longer the most important number. The distance of the
bottom bracket to the road can also mislead the seat tube length. The top tube length is traditionally the distance
Summary of Contents for G Plus Mariner 7
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